The We-Vibe Sync O is one of the few couples vibrators I orgasm with hands-free during sex. Though no couples vibrator is as stimulating as a handheld like a wand vibrator or bullet vibrator, which have more power, and allow you to place the motor exactly where you want and press however hard you want. But the Sync O frees up your hands to engage more with your partner.

Because it has an adjustable hinge, I can find a comfortable, stimulating fit that maintains consistent contact with my clit. So the vibrations transfer from the motor to my body. Whereas entry-level models with a fixed shape like the Sync Go, the Sync Lite, the Romp Join, and others like them shift off my clit easily and hardly stimulate me during sex.

The Sync O’s internal arm differs a bit from other premium couples vibrators. Instead of the more bulbous arm of the Chorus and Sync 2, it uses a flexible silicone loop. You squeeze the sides of the loop together to insert it, and it gently expands back out to press against the sides of your vagina rather than the front wall. Because it is slim front-to-back, it leaves more room for penetration and does not feel as full. That makes the Sync O the most comfortable couples vibrator I’ve worn during sex for those who prefer a less girthy feel.

But that same loop is why the Sync O is less stimulating during sex than the Chorus and Sync 2. It has no G-spot motor, and the flexible loop does not press into my front wall the way those models’ rigid arms do. On bulbous models, my partner’s thrusting pushes the internal arm into my G-spot and adds pressure that makes orgasm easier for me.

The Sync O doesn’t do that. The loop also clamps less tightly during thrusting, so the clit arm can pivot slightly to the side and I have to grind more to get as good of stimulation. The clit vibrations are enough to get me there hands-free, but it takes more time and effort.

If the strongest hands-free stimulation during sex is what you care about most, choose the Chorus or Sync 2. The Sync 2 gives you that same during-sex stimulation for a little less, while the Chorus adds a second hinge for the best possibility of getting your ideal fit. Choose the Sync O if you want the couples vibrator that feels the most comfortable during sex.

In the next sections, I’ll cover the Ferri’s vibration power and rumbliness in-depth.

Here’s the main conclusion:

The Ferri is the most stimulating panty vibrator we’ve tested, and one I orgasm with hands-free the easiest.

It’s the strongest panty vibe I’ve tested and transfers more of its motor’s power to your clit than any other. Like most panty vibrators, the vibrations are buzzy rather than rumbly. If rumbly stimulation matters more to you, go with the VeDO Niki. If power matters more, go with the Ferri.

In the next sections, I’ll cover the Sync O’s clit vibration power and rumbliness in more depth.

Here’s the main conclusion:

The Sync O’s clit vibrations are strong for a hands-free couples vibrator. The adjustable hinge helps the vibrations transfer well to my clit, though it is still slightly less stimulating than the Chorus or Sync 2.

Its only moderately powerful compared to stronger panty vibrators or handheld vibrators like wands or even bullets, so those are more intense options if hands-free stimulaton during sex isn’t your priority.

The Lovense Ferri reaches a top power of 9.35 out of 10 – the strongest of any panty vibrator we’ve tested, and it’s the one I orgasm with the easiest.

Other panty vibrators I recommend like the VeDO Niki and the NS Novelties Techno Lucy top out at 8.0 and 9.0. And the range available through the app is wide, from a very gentle 1.0 up to that 9.35, so there’s soft warmup levels and strong upper levels.

The Ferri also transfers that power to my clit better than any other panty vibrator I’ve tested. With a handheld toy you can position the toy where you want it and press harder for more intensity; but with wearables the toy’s shape and fit have to do all the work of delivering the motor’s strength to your body. The Ferri is one of the few panty vibrators that does an excellent job transferring vibrations to my clit. The slightly curved design hugs the body, and the short length prevents the toy from pivoting or getting knocked out of place with movement.

And the Ferri’s curve with a taller front also lets you apply more pressure when you want to without using your hands – something flat panty vibes can’t do. When you’re sitting, shifting your weight against the end opposite your clit tilts the toy and presses the clit-end more firmly into you, making the vibrations feel stronger. It’s the closest a hands-free wearable gets to the pressure control of a handheld.

The stimulation profile here is focused and precise rather than broad and blanketing. If you prefer broad stimulation that spreads the stimulation out, the VeDO Niki is also a good option, but not quite as strong.

The We-Vibe Sync O’s motor has a broad power range that starts gently and reaches 6.75 out of 10 on high. That’s moderate for wearable vibrators overall, but tied for the strongest hands-free couples vibrator I’ve tested – the We-Vibe Chorus, Sync 2, and original Sync deliver nearly identical clit stimulation. However, these models add extra G-spot stimulation that the Sync O lacks.

Despite having only moderate power, the Sync O’s vibrations transfer well to my clit. The adjustable hinge keeps the clit arm pressed against me very well, unlike cheaper, flexible-only couples vibrators.

Moving around, it presses slightly less firmly than the Chorus and Sync 2, whose bulbous internal arm tilts the toy harder against the clit; but sitting or lying down, the contact is just as good. Since the Sync O doesn’t add extra internal pressure during penetration, the overall clit stim feels more moderate.

If wearable clit stimulation outside sex is your goal, a stronger panty vibrator like the Lovense Ferri is a better fit. Or a handheld like the Lovense Hyphy if you want control over placement and pressure instead of hands-free convenience.

We rate rumbly vibrations higher than buzzy ones because most people prefer them, but it’s a preference and some people enjoy buzzy vibrations more (I like them personally).

Like most panty vibrators, the Lovense Ferri’s rumbliness is mediocre. The Ferri’s vibrations are moderately buzzy at medium strength, and extremely buzzy at the top of its range. Although its lowest settings are rumbly, most people will use them mainly while warming up. Vibrations always become buzzier as you increase power, and by the time you reach the upper levels that you’ll likely need to orgasm, the vibrations are entirely in the buzzy range.

This buzzier feel is typical of most panty vibrators, including the We-Vibe Moxie+, NS Novelties Techno Lucy, Romp Party and others. The small motors that fit inside a panty vibe tend to need to spin faster (be buzzier) to produce the power larger motors can at slower (more rumbly) speeds.

If rumbly vibrations are a strong preference for you, the VeDO Niki has much deeper-feeling vibrations. I personally enjoy both the buzzy feel of the Ferri’s vibrations and the rumbliness of the Niki’s.

We rate rumbly vibrations higher than buzzy ones because it’s what most people prefer – rumbly vibrations travel deeper and spread through the body instead of staying near the surface – but it’s a personal preference, so consider what you like.

The Sync O’s motor is only decenetly rumbly – the Sync 2 aand Chorus each have deeper vibrations than the Sync O. Its lowest setting is extremely rumbly at around 56 Hz, the middle settings settle into neutral, but the upper settings do become buzzy, but I still enjoy how they feel.

It’s common for toys to become buzzy on higher settings, but the Sync O layers a low, rhythmic pulse over the steady vibrations that makes it feel a little deeper and fuller than the raw frequency suggests. That pulse is strongest through the first three-quarters of the range.

The Sync 2 and Chorus hold their rumble a little better at the top.

Like all panty vibrators, the Lovense Ferri only stimulates your clit – not your G-spot. Since most women need clit stimulation to orgasm, a panty vibrator is often the right type of wearable – that’s why I personally enjoy it more than the Lovense Lush 4 and Lush Mini. But if you’re interested in G-spot stimulation instead, see all our recommendations for the best egg vibrators here.

The We-Vibe Sync O’s internal arm does not vibrate. In general, couples vibrators’ internal arms are mainly there to help anchor the toy in place and provide a little extra pressure on your G-spot when combined with penetration. Even the ones with vibrating G-spot motors like the We-Vibe Chorus and We-Vibe Sync 2 are pretty gentle – though having a motor usually does make the internal arm’s shape a little more bulbous so they tend to provide better G-spot pressure.

In the next sections, I’ll cover the Lovense Remote app’s close-range and long-distance features in depth, plus the Ferri’s connectivity in both modes.

Here’s the main conclusion: Lovense’s app is the best of any brand’s I’ve tested, by a wide margin.

I have many remote and app-controlled toys, and Lovense’s app provides the most control, is easiest to use, and has the most reliable connectivity.

If app control matters a lot to you in a panty vibrator, the Ferri is the best choice.

In the next sections, I’ll cover the We-Vibe app in-depth – its close-range features, long-distance features, and its connectivity.

Here’s the main conclusion:

The We-Vibe app is buggy and bad – far behind Lovense’s app. But for hands-free stimulation during sex, I usually prefer the physical remote or on-toy button anyway. The app is a downside, but not a dealbreaker because We-Vibe still makes the only couples vibrators I reliably orgasm with.

In close-range control, it caps the Sync O’s motor at about 80% of its full power, and freezes often enough that I don’t trust it. Long-distance control is worse: the app often blocks you from even starting a call, and commands tend to stop working even when you do connect.

There’s no good couples vibrators with a good app. If app control matters more than hands-free stimulation during sex, go with a Lovense toy instead: the Lovense Ferri for clit stimulation, Lovense Lush 4 for G-spot stimulation, or Lovense Dolce for dual-stimulation.

The Ferri’s app has the best close-range features of any panty vibrator I’ve tested.

From the main remote screen, you’ll control the Ferri by dragging its control dot up and down to adjust the power. Tap “Float” to keep the power constant or click “Loop” to quickly repeat a pattern you draw on-screen. This makes it easy to set your Ferri exactly to your preferred intensity or quickly create your own vibration patterns from the same screen.

The vibrations play as you draw, so you can feel whether you actually like the pattern – some apps make you draw a waveform blindly, save it, then play it back to feel what it does. Tapping “Record” also saves the pattern to “My Patterns” for re-use if you enjoyed it.

You can also connect and control multiple Lovense toys at once with each motor getting its own dot on the Remote screen. So if you have both a Lovense Lush 4 and a Ferri, you can control them together for simultaneous clit and G-spot stimulation (which I personally prefer over using the dual-stimulation Lovense Dolce). Or you can control your own toy and a nearby partner’s toy at once. We tested four toys simultaneously without issue.

For preset patterns, you can use the “My Patterns” screen which has four defaults to choose from, plus anything you’ve drawn and saved, and any patterns you’ve downloaded from Lovense’s community library. Lovense has an active community creating and sharing patterns to browse and download.

Sound-reactive control is also excellent and the most practical I’ve used in any app. You set a minimum decibel threshold – the toy stays silent when the sound around you is below the threshold. And you set a sensitivity – how much of the toy’s power range will be used when the sound is above the threshold. There’s also a live decibel readout to calibrate against the room you’re in. Many other apps try to combine these settings or don’t even have a threshold control.

The music-sync mode is pretty good: it follows what’s playing on Spotify or your local files, but the only real control is capping the maximum intensity. It works fine as a way to get changing vibrations without having to control anything yourself.

Lovense has a few niche extra control features and settings that can be helpful – Voice Control if your fingers are otherwise occupied, and Device-to-Device control where another Lovense toy (the Max 2, Nora, or Solace) drives the Ferri’s vibrations through the controller’s own movements. You can also set a max-intensity setting for each toy to cap how high the vibrations can go – this can be useful both for keeping the toy below a noise threshold and for limiting how high a partner can push it if you’re sensitive to overstimulation.

Overall, the Lovense app’s close-range features are excellent and the best of any brand.

The We-Vibe app’s close-range features are weak because the app is so buggy. If it worked properly, it would be a decent option for simple intensity control and preset patterns. But the current experience is frustrating.

The main controls are Single Vibe and Multi Vibe. Both let you drag an on-screen dot up or down to adjust intensity. Multi Vibe also lets you assign preset patterns to four corners, so you can quickly switch between steady vibration and a few favorites without digging through menus.

The Sync O’s max power in the app is only 80% of it’s true strength. This is a dealbreaker for using the app, considering the Sync O’s on the gentle-to-moderate end of strength anyway. You’ll have to use the remote or on-toy button to reach the toy’s full power.

The control dot also occasionally freezes and stops responding, and you have to close and reopen the app to get it going again. The disruptions are annoying.

There are 10 preset patterns to choose from in Single or Multi Vibe, each with a name and a waveform icon. Some are easy to read, like Pulse and Wave; others you have to try before you know what they do. One thing We-Vibe does better than Lovense here: you can adjust the power of each preset pattern. There’s also a Playlist feature for stringing patterns together, but you can’t feel what you’re building as you go, so it’s mostly guesswork.

Custom pattern creation is clunky. It’s buried several taps deep, you can’t feel the pattern as you draw it, and when I tried to play back one I’d made, it crashed the app every time. Lovense does pattern creation far better.

The sound and music modes are okay. Sound Mode uses your phone’s mic, and Music Mode syncs to songs saved locally on your phone – not Spotify or Apple Music, which is not very versatile. Both work, but the controls are poorly labeled, and there’s no minimum-volume threshold like Lovense offers to keep the toy quiet until the sounds around you are loud enough to cover it.

If you want excellent app control, Lovense is much better: choose the Lovense Ferri for clit stimulation, the Lovense Lush 4 for G-spot stimulation, or the Lovense Dolce for dual stimulation. But none of those are couples vibrators you can wear during sex, so if that’s your goal, just skip the app and use the Sync O’s remote.

Lovense’s long-distance experience is also the best of any panty vibrator I’ve tested, by a wide margin.

When messaging or video calling, my partner gets the same great Remote screen with the Float and Loop controls, so they can set a constant intensity or draw a looping pattern easily. The long-distance core controls aren’t stripped down like many apps do. One minor downside is that you can’t control your own toy during a video call; only your partner can. Most of the time that’s fine, but occasionally I’d like to take over for a moment to set my own intensity.

The video call tools are excellent and make for a seamless experience with your partner.

Getting into a call is easy – when your partner sends a video call request, there’s a clear screen on your phone with a green accept button or red reject button. Some apps send the request to a particular screen and your partner has to go there to find it, which makes calls easy to miss, but requests in Lovense’s app are noticeable.

When you’re in a video call, you can mute, toggle your camera off/on, flip video to front or back, cast the audio to a speaker, or end the call.

It’s easy to see your partner and access the controls – the video feed is clear by default. Just tap the screen to bring up the control panel. You can also reposition your self-view anywhere on the screen to see your partner more clearly. Some apps keep annoying controls permanently covering the view of your partner.

You can both lock your phone screen or use other apps without issue. The in-app messaging is alo excellent and very easy to use with a thread that’s easy to follow – it looks just like any other message thread. You can send all the important media types you might want to: voice notes, photos, and videos from your camera or camera roll. And there’s an effective, optional “burn after reading” feature for single-time viewing and preventing screenshots.

You can adjust your partner’s settings to auto-accept their control requests so they can take control of your toy by surprise, get a push notification when they come online, or hide your online status from them specifically. And each partner’s controls can be set differently.

Anonymous and group play is broader than any other app-controlled brand. You can send a one-time control link to someone or create a group link for up to 10 people to control your toy. When time’s up they lose control and can’t request it again.

If long-distance play is the main reason you’re buying a panty vibrator, the Ferri is the best choice.

The We-Vibe app’s long-distance features are too buggy to recommend. The controls break so often mid-session or even prevent you from connecting, so long-distance play is effectively unusable.

In theory it works like close-range control. Once you’re in a video call or chat, your partner is supposed to get the same Single Vibe and Multi Vibe controls you use nearby, plus the same basic pattern controls. You can even take back control of your own toy mid-session without ending the call – a useful touch that more apps should provide.

But the same close-range problems carry over, and some new, worse ones. In many sessions my partner and I tried, the toy just didn’t respond to what we did in the app – you drag the control dot expecting your partner’s vibrations to change, and nothing happens on the toy-end.

The power cap carries over too, so your partner can’t reach the Sync O’s strongest settings from the app. And you often can’t connect at all: both partners frequently show as “offline” even when you’re both in the app.

Even when you do connect, starting a video call is clunky – you send and accept four separate requests (the call, the camera, control of your toy, and control of theirs), and they often don’t go through. The video is blurry and choppy compared to Lovense’s.

Messaging itself is fine – you can send text, photos, voice notes, and video clips. And We-Vibe lets you save multiple partners, but it doesn’t offer Lovense’s anonymous one-time control links or auto-accept settings for a trusted partner.

For long-distance play, a Lovense toy like the Ferri, Lush 4, or Dolce is far better – but none of them are couples vibrators you can wear during sex.

The Ferri’s connectivity is excellent and the most reliable of any panty vibrator I’ve tested, in both nearby Bluetooth and long-distance modes.

Pairing is fast and easy. The very first time is fast but takes a couple steps: tap “Add Toy,” turn the Ferri on, and it appears in the toy list to be added in seconds. After that one-time setup, the Ferri auto-connects immediately when you turn it on with the app open.

Once paired, the Ferri stays connected through normal phone behavior – locking the screen, switching to another app, or leaving Lovense Remote idle for long stretches doesn’t drop the connection.

It also stays connected through body interference like happens when a partner is controlling your toy from an angle or behind you. Water-rich materials like body tissue dampen Bluetooth signals more than walls or clothing, which is why some panty vibrators that handle solo app control fine still drop the connection during partner control.

Our body-interference test simulates this at three progressively harder positions, and the Ferri holds a stable connection at all three – including the most severe angle. Other panty vibrators like the Satisfyer Sexy Secret and NS Novelties Techno Lucy lose the connection at that worst-case angle. So if a partner controlling your toy with a lot of your body in the way is part of how you’ll use a panty vibe, the Ferri’s connectivity is excellent.

Bluetooth range came in around 190 feet in our open-air test (measured with a clear line-of-sight) before the connection dropped – well past the distance you’d likely cover during typical wearable use. Your own results may vary depending on walls and interference.

When a disconnect does happen (like if you walk out of range, or something briefly blocks the signal), the app reconnects automatically as soon as the signal is clear, and a red “Reconnecting…” indicator on screen shows the controlling partner that control has paused rather than pretending it’s still working.

Two settings also give you control over what the vibrations do during a disconnect: Auto-Stop pauses the Ferri until reconnection – useful for making sure the toy stays silent – or you can set it to keep the last vibration level running so stimulation isn’t interrupted.

The long-distance connectivity is also excellent. The long-distance connection works in two parts: the Ferri talks to your phone over Bluetooth (the same as during nearby play), and your phone talks to your partner’s phone over Wi-Fi or cell data. So as long as your cell signal or Wi-Fi is decent, the long-distance connection works well. Sessions don’t drop unexpectedly, commands consistently take effect, and the connection survives normal phone behavior on either end (locking the screen, switching apps, backgrounding Lovense Remote).

It can be spotty if you’re continually switching from wifi to cell data. So if you’re in this situation, it’s best to start the call on cell data, which prevents the call from dropping.

The We-Vibe app’s connectivity with the Sync O is poor in close range and broken in long distance. The problem isn’t the Bluetooth signal – it’s the app, so it affects all of We-Vibe’s couples vibrators. You’ll want to control the Sync O from the remote. And if app-control is important, choose a Lovense toy instead.

The Sync O’s Bluetooth hardware is actually strong – it can handle locking your screen or switching apps, has excellent range (170 feet in our test), and holds up well to body interference.

Initial pairing is simple. Once you’ve added the Sync O to the app, it usually reconnects in two taps with no on-toy action needed – as long as you use one phone and only own a We-Vibe toy or two. You’ll have more trouble if you own several We-Vibe toys or connect the same toy to more than one phone, like you and a partner each pairing your own phone. Then the quick-connect often fails, and the fix is a tedious routine: delete the toy from the app, forget it in your phone’s Bluetooth settings, and pair it again from scratch.

Reconnecting mid-session is unpredictable. If the signal drops and returns within 10 to 20 seconds, the app usually reconnects on its own – but during that window it still looks connected, so whoever’s controlling the toy can be dragging the dot while nothing actually happens. If you’re out of range longer, you’ll often have to reconnect by hand, sometimes by holding the on-toy button, which is awkward while wearing the toy.

The biggest problem is that the app itself frequently doesn’t respond correctly: On the Single Vibe and Multi Vibe screens the toy sometimes ignores the control dot, or the dot freezes and you have to close and reopen the app to recover. It’s hit or miss, but frequent enough that I don’t trust the app during play.

Long-distance play is where it’s especially problematic. Both partners often show as “offline” even when you’re both sitting in the app, which stops a session from ever starting, and when you do connect, control commands are often missed with no indication on the controlling-partner’s end. Both bugs happen often, with no reliable fix.

For excellent connectivity in close range or long distance, a Lovense toy like the Ferri, Lush 4, or Dolce is a more reliable choice – but none of these is designed to be worn during sex, so for the Sync O itself, the remote or on-toy button is your best option.

The Lovense Ferri doesn’t include a physical remote control. A remote lets you adjust the toy by feel – without pulling out your phone. Though there’s other downsides like less depth and no visual feedback to help your partner know what your toy’s doing. If you want to consider options with physical remotes, see our recommendations in these guides:

• best remote and app-controlled vibrators (all types of vibrators)
• best wearable vibrators (wearables only).

In the next sections, I’ll cover the Sync O’s remote features and connectivity in detail.

Here’s the main conclusion: the Sync O’s remote is good, with all the controls you need and works reliably unless there’s a lot body interference. It can become unreliable when too much of your body comes between the toy and remote (which only really happens when your partner is controlling your toy from a sharp angle), but that doesn’t actually come into play when you’re controlling the toy yourself or during sex (which is what the Sync O is best for).

The We-Vibe Sync O’s remote features are great.

One of the best aspects is that the power and pattern controls are separate. There’s dedicated + and − buttons to move forward and backward through 11 power levels. And pressing and holding either button helps you reach a higher or lower setting faster.

There’s forward and backward buttons to move through the 6 vibration patterns. So I never have to cycle past patterns to reach a power level or vice versa – many remotes put power and patterns on the same loop. And you can raise and lower the intensity of each pattern.

The remote itself is comfortable to hold. It’s small and silicone-coated sitting naturally in my hand and feels more luxurious than We-Vibe’s older remotes like the original Sync’s hard plastic remote. And I also find its smaller size more comfortable to hold than the Chorus’s and Chorus Pro’s larger remotes. And the buttons are raised enough that I can feel which is which without looking – this kind of eyes-free operation can be a practical advantage of a remote over an app.

Like most remotes, the Sync O’s remote just blinks when a button is pressed – there’s no way for the partner holding it to tell what setting your toy is on. It’s not a huge deal, especially if you’re often the one controlling your own toy. But for a controlling partner, it can feel less engaging than an app’s visual feedback.

The Sync O’s remote connectivity is great in the use that matters most – controlling the during sex or yourself. But it is sensitive to heavy body interference which can happen if a partner controls your toy from extreme angles as you wear it around.

Body tissue between the controller and the toy is what most often weakens a remote’s signal – RF and Bluetooth signals get dampened by water-rich materials like your body more than most walls and other objects.

Our body-interference test simulates this at three different angles. During our testing, the Sync O’s remote was stable at the middle angle and workable at the first – missing only a couple commands – but at the steepest angle it struggles, dropping most commands.

Our test runs harsher than real use, though, especially because the Sync O’s wireless receiver sits in the externally worn portion of the toy, so there’s often little body tissue between it and the remote. Especially when you’re controlling the Sync O yourself, or during sex with the remote right by you and a clear shot to the toy, commands go through reliably; the misses only surface when a partner controls it from an awkward angle while you’re wearing it around, with more of your body in the way.

Button presses register with barely any delay and pairing is instant and automatic. The remote reaches about 40 feet in our open-air range test, measured with clear line-of-sight and no body interference. That’s shorter than many of the wearable remotes we’ve tested, but is still plenty of range for most scenarios.

Like most panty vibrators, the Ferri’s on-toy controls are limited by design – the toy sits inside your underwear during use, so you’ll typically rely on the app.

A single button cycles forward through three power presets and four vibration patterns; there’s no backward step, and the full power range is only available through the app. The three presets are programmable from the app’s “Adjust Levels” screen, so you can set them to whatever levels you like. I’d rather the patterns weren’t on the cycle – most people don’t use them, and they add more clicks when you’re cycling through power levels.

The button is easy to feel and press without looking. Pressing pushes the Ferri against your body, but the button sits further back from the clit-end than on most panty vibrators, so the pressure lands in a plusher, more comfortable spot than a lot of panty vibrators.

In practice, the on-toy button is mostly for turning the Ferri on and off – the app handles everything else.

Like most hands-free couples vibrators, the Sync O’s on-toy controls are basic since many people will use the remote (or app if it worked well).

A single button cycles through 4 power levels and 6 vibration patterns on the same loop. To drop back to a lower power you have to click past the remaining patterns to get there. With 4 power levels covering the full range, the cycle is short enough for occasional use.

The button itself is easy to find and press: it’s visible, has a distinct feel, and sits on the external arm so you don’t have to remove the toy to adjust it.

While the controls are limited, I actually like using the on-toy button during sex. It’s nice to just reach between my legs and click when I’m warmed up and ready for more intensity, rather than setting the remote down somewhere nearby and finding it again when I want to change settings.

The Lovense Ferri stays securely in place.

The magnet allows you to position the Ferri in the best spot on your underwear for you and secure it in place. The Ferri’s magnet is very strong, and the Ferri’s body is lightweight, so there isn’t much weight working against the anchor. The magnet is strong enough to hold the Ferri through my hand. I can place the toy anywhere in my underwear it stays there.

When using the Ferri in bed, it doesn’t budge from where I magnet it. Leg movement when shifting between sitting, lying back, and rolling onto my side nudges the toy a little, but I never feel it slipping off my clit – any small repositioning is just to optimize the spot.

When wearing it around while walking, it wiggles side-to-side a bit, but the magnet holds securely – and this movement actually makes it feel more stimulating.

Heavy activity like running, squats, dancing, and jumping jacks is where the Ferri shifts the most. It bounces around a little with gravity on landings, but always snaps back to its original spot, never falls out, and stays in a stimulating place throughout.

The We-Vibe Sync O is the most secure-fitting couples vibrator I’ve tested – it stays put better than any other I’ve worn, especially while I’m up and moving around. In this section I cover its fit for solo wear in bed, walking around, and heavier movement; for how it holds during sex, see Hands-Free Use During Sex.

The flexible silicone loop is what keeps the Sync O in place. It’s wider side-to-side than the more bulbous internal arms on the Chorus and Sync 2. The Sync O’s loop presses against the sides of my vagina instead of just the front wall to stay in place and requires more of a tug to remove than any other We-Vibe couples vibrator.

Walking, climbing stairs, and doing chores don’t move it at all. Even heavier movement barely fazes it: running and high knees don’t budge it – it bounces as I land, but the springy loop pulls it right back into place without my having to reach down and fix it. It’s best to wear snug clothing as an extra precaution though.

The bulbous-armed Chorus and Sync 2 start to wiggle loose during that kind of vigorous movement. Though I find these hold more firmly clamped against my clit during sex.

The Sync O has a single adjustable hinge at the base of the clit arm. You bend it to the angle that suits you and it holds that shape, which is what keeps the clit arm pressed against me.

Adjustability is key with couples vibrators – I can only orgasm with C-shaped toys that have an adjustable hinge, and not with flexible-only options – those shift around and often fall out when walking.

The one real limit is that the hinge changes how tight and angled the fit is, not how far the clit arm reaches – if the arm doesn’t quite reach your clit to begin with, no adjustment will extend it, so there’s still some dependency on it fitting your anatomy well.

The Ferri is comfortable to wear in bed and during light activity, but its firm body and focused contact surface keep it just behind the most comfortable panty vibrators I’ve tested.

When walking or going up and down stairs, the Ferri shifts a small amount side-to-side, and that movement translates into a little extra clit stimulation, but also a little less comfort. The toy is small enough that I never have to adjust my walk, and the slight wiggle doesn’t bother me personally. But it’s noticeable, and it isn’t something you can really control.

In bed, it’s very comfortable. There are no sharp seams, and the slight curve lays the toy along my pubic area so it doesn’t pull off or tap uncomfortably as I shift around. The Ferri has no flex or squish, though, and the contact area is small. When I roll onto my side, I feel some pressure as my legs push the firm toy into my body. It’s not painful, just something I notice. And the firm, focused shape is what allows the vibes to transfer so well.

If comfort is the priority, both the NS Novelties Techno Lucy (app-controlled) and the VeDO Niki (remote-controlled) are more comfortable options. Just be aware, the Lucy’s app is much worse, and the Niki isn’t quite as strong as the Ferri.

The We-Vibe Sync O is an extremely comfortable C-shaped couples vibrator, whether in bed or while walking around. In this section I’ll cover the comfort during solo use in bed and wearing around – for comfort during sex, see Hands-Free Use During Sex.

In bed, I barely notice it’s there. The flexible silicone loop is slim front-to-back and sits against the sides of my vagina rather than filling it, so the internal piece doesn’t cause any pressure on my bladder that can be less comfortable like larger egg-shaped toys such as the Lovense Lush 4 or Lovense Dolce.

The adjustable hinge lets me set a fit that’s snug enough to stay put but never so tight it presses uncomfortably, and the smooth silicone feels great against your body.

Moving around, it stays just as comfortable. Walking and doing light chores, I don’t feel the internal part at all, and the external arm rests comfortably against my clit without jostling or tapping uncomfortably.

While the Lovense Ferri isn’t the quietest panty vibrator I’ve tested, it’s reasonably discreet.

It was just below the most-discreet tier of wearables in our Background Noise Masking subtest. In this subtest, I wear the vibrator and my partner listens from three feet away while we play pink noise through a speaker at preset volumes (56, 62, and 68 dBA). One of the Ferri’s oddities is that the lower settings have harsher, more uneven sound. Whereas the higher settings vibrate more cleanly and are less noticeable – even though their decibel readings are nearly identical at around 43 dBA each. So the Ferri’s middle and high vibration strengths were masked by our quietest background audio (56 dBA of pink noise). But to mask the lowest vibration setting, we had to increase the pink noise to our moderate level (62 dBA).

The Ferri had a similar pattern behind a closed bedroom door. For this part of the noise test, my partner listens from the other side of the bedroom door while I use the toy in bed. I use it like a handheld toy since wearing dampens sound, and some people want the flexibility to safely re-position the toy or move it around. Holding the toy instead of wearing it gives us the most conservative results.

My partner couldn’t hear it on low or high power. But he heard the middle setting – really only when I was moving the toy so the sound was changing. The middle has that more jarring quality and enough strength that it draws your ear; high power settles into a cleaner, consistent pitch – which is why high power is actually more discreet than the middle behind a closed door.

If you want a more discreet panty vibrator without giving up much power, the VeDO Niki (remote-controlled) is meaningfully quieter and is another one of the strongest panty vibrators I’ve tested.

The We-Vibe Sync O is one of the quietest wearable vibrators. On low power it was too quiet for our sound level meter to pick up over the room’s 35 dBA ambient noise, and even on high it measured only about 42 dBA which is very quiet. The motor’s low-pitched rumble easily blends into the background, and while wearing it, I can barely hear it myself.

In our background-masking test, I wear the toy while my partner listens from three feet away and we play pink noise through a speaker at quiet, moderate, and loud volumes. He could not hear the Sync O at any vibration strength under any of those three tested volumes. It is audible in our room with no background audio playing, but every wearable I’ve tested is audible in a completely quiet room.

For the closed-door test, my partner listens directly outside our bedroom door while I use the toy in bed. I use it like a handheld toy here because wearing dampens the sound, and some people want the flexibility to safely reposition wearables or move them around. Holding the toy instead of wearing it gives us the most conservative result. He could not hear the Sync O from behind the closed door on any power level.

Most hands-free couples vibrators I’ve tested are similarly quiet, including the We-Vibe Chorus and Sync 2. So if you are choosing between couples vibes, stimulation, comfort, and fit during sex matter more than small noise differences.

The Lovense Ferri lasted 168 minutes during our test continuously vibrating on its top power level – the longest of any panty vibrator. Plus, in actual use you’ll likely use the lower and middle settings too which will extend the battery life.

The We-Vibe Sync O lasted 93 minutes at its highest power in our test – the longest battery of any We-Vibe hinged couples vibrator. The Chorus and Sync 2 both last about half an hour less.

That’s plenty for the Sync O’s main use – I never need more than an hour of continuous full-power vibration during sex. And because the Sync O is also comfortable to wear around, the longer runtime helps outside the bedroom too.

It still falls short of the best vibrators built mainly to wear around, though: for instance, the Lovense Ferri panty vibrator lasted 168 minutes – but it isn’t a couples vibrator you can wear during sex.

The Lovense Ferri is easy to clean. It’s IPX7 waterproof, so you can rinse it under a running faucet or fully submerge it in soapy water without worry.

The We-Vibe Sync O is easy to clean. The toy itself is fully IPX7 waterproof, so you can rinse it under a running faucet or fully submerge it in soapy water. It is also safe to take into the shower or bath.

However, the IPX4 remote can only resist light water splashes. You should not take the remote into the shower or clean it under a running faucet. Clean the remote with a damp cloth.

The Ferri’s build quality is excellent – I’ve had mine since 2020 and it’s still working exactly as expected. The toy is smooth, firm silicone on the side in contact with your body, with some plastic and magnetic portions on the other side. The magnet that anchors the toy is small but very strong. The seams are all tight, and the single button has a satisfying press without needing much pressure to activate.

The We-Vibe Sync O has excellent build quality, on par with the rest of We-Vibe’s high-end line like the Sync 2 and Chorus. I’ve had mine since 2023 and it’s continued to work as expected.

It’s coated entirely in smooth, plush body-safe silicone that feels luxurious. The adjustable hinge feels solid, holding firm when I press on it and keeps the angle I set, and the connection between the internal and external arms feels strong enough that I’m not worried about it snapping during normal use.

The flexible O-shaped internal loop has a nice spring to it, expanding back to its resting shape quickly every time. We-Vibe also refreshed the controls: the on-toy button is the newer, larger design that’s easier to press than on older We-Vibe toys, and the remote’s buttons press easily with a satisfying click.