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We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
You want open ears or bone conduction? Here's the honest split: for most people, open ear wins. It's more comfortable for all-day wear, it works with glasses, and it lets in the outside world without a plastic hook pressing on your skull. Bone conduction only pulls ahead in one specific place — and that place is water.
• Bone Conduction Earbuds — best if you swim, surf or dive and need audio that survives being submerged, because the sound travels through your cheekbone instead of the air.
• Open Ear — best if you want all-day music, calls and podcasts while staying aware of traffic, coworkers and your surroundings, without anything jammed in your ear canal.
Bone conduction sends vibration through the bone in front of your ear, so your ear canal stays completely open. Nothing blocks it. That is the entire point of the design: you hear your music and the world at the same time, and your ears never feel plugged.
The defining spec to watch is the waterproof rating, and this is where the category separates itself. The SANOTO S710 carries IPX8, which means it can sit submerged up to 10 meters for over two hours. That is not a marketing number — that is a genuine engineering claim that changes what you can do with the product. Pair that with a built-in 8GB MP3 player and you have a device that works where Bluetooth physically cannot.
That last part matters more than people expect. Bluetooth runs on the 2.4 GHz band, and water absorbs that band. So underwater, Bluetooth simply stops. The S710's answer is to store your music onboard instead — double-tap the function key, switch to MP3 mode, and you're listening in the pool with no phone involved. It plays MP3, FLAC, WMA, WAV and APE, and 8GB holds roughly 1,500 lossless tracks. That's a substantial library with zero connectivity required.
The trade-off is real, though. Bone conduction bass is thinner than what a sealed in-ear or a well-tuned dynamic driver delivers, because it's vibrating bone rather than pushing air. And the hook-style fit, while stable, is a physical presence on your head that you notice over a long day. This is a specialist tool, not a daily driver.
Open ear earbuds clip or rest outside the ear canal and fire sound inward. Your canal stays open, same as bone conduction, but the sound comes through the air — which means the driver can actually move air, and that's why the low end is fuller.
The TOZO OpenEarRing makes the comfort argument for the whole category. Each earbud weighs 5.1g. That's light enough that the company specifically engineered the shape for glasses wearers, so the arm of your frames doesn't fight the earbud. If you wear glasses all day, this is a genuinely relevant detail rather than a bullet point.
The other headline spec is battery: 40 hours total, with 10 hours on a single charge and the case covering the rest. Charge time is 1.5 hours, and the case has a digital display so you can see where you stand instead of guessing. Bluetooth 5.4 with a 20-meter range is generous — you can leave your phone in one room and wander.
Sound-wise you get a 10mm dynamic driver, a 30 Hz to 20,000 Hz frequency range, and OrigX processing that TOZO tunes for dialogue clarity, which is a real benefit if you watch a lot of video. Latency is listed at 60 milliseconds, low enough that lip-sync mostly holds up. There's also app-based EQ with 32 presets and access to a much larger shared library of profiles.
The trade-off: this is not a water product. There's no waterproof rating in the specs, so don't treat it as a swim companion. And open ear still leaks a little sound outward at high volume, so it isn't the pick for a quiet office where you need total silence.
Water resistance is not close. The bone conduction pick is built around IPX8 and underwater operation. The open ear pick has no stated water rating. If water is part of your routine, that single line decides it.
Everyday comfort goes the other way. At 5.1g per bud with a clip-on shape designed around glasses, the TOZO is the one you forget you're wearing. The SANOTO's ear hooks are soft silicone and hold up under a swim cap or goggles, but it's a more noticeable fit.
Battery favors open ear. 40 hours total with a display case versus 12 hours in MP3 mode and 8 hours in Bluetooth mode. Different use cases, but if you're measuring raw listening time per charge, open ear wins comfortably.
Controls and tuning are more flexible on open ear. Button controls on the SANOTO are simple and reliable — good for wet hands. The TOZO gives you touch controls plus a full app with EQ customization, which is a bigger toolkit if you like to tweak.
Sound signature: the SANOTO uses a closed sound cavity with anti-leak acoustics, which gives focused, isolated sound and keeps your music from spilling into the pool. The TOZO uses a 10mm dynamic driver with fuller bass and better vocal detail. Neither is objectively "better" — they're tuned for different rooms.
Which Should You Get?
In my opinion, most people should buy the open ear pair. If your listening happens on land — commuting, working, running, driving, watching shows — open ear gives you more comfort, more battery, more tuning control and better sound for the money.
Buy bone conduction instead if you swim. That's the one case, and it's a decisive one. No open ear bud without a water rating is going to survive laps in a pool, and the SANOTO S710 is engineered specifically for that environment with onboard storage to solve the Bluetooth-underwater problem.
The SANOTO S710 is the straightforward choice if swimming is your priority. It pairs IPX8 waterproofing rated for 10 meters and over two hours submerged with an 8GB onboard MP3 player, which is the combination that actually makes pool audio work — you load your tracks, switch modes with a double-tap, and leave the phone on the deck.
The rest of the package is built for the same job: skin-friendly silicone ear hooks that stay put under a swim cap and goggles, a closed sound cavity with vibration tech and anti-leak acoustics so the sound stays yours, and a claimed 12 hours in MP3 mode or 8 hours over Bluetooth. It ships with a magnetic charging cable, 10 replacement ear tips, adjustable elastic straps and a manual, and it's covered by a one-year replacement or refund warranty. It's a purpose-built swim tool, and I'd treat it as exactly that.
Our Pick If You Choose Open Ear
Inside, you get a 10mm dynamic driver covering 30 Hz to 20,000 Hz, OrigX acoustic processing tuned for clear vocals and dialogue, and 60 ms latency that holds up for video. Bluetooth 5.4 gives you a 20-meter range, and the TOZO app opens up 32 EQ presets plus a large shared library of custom profiles if you like to tune your own sound. Touch controls handle calls and playback, and it charges via USB-C in about 1.5 hours. It's the better all-rounder — just keep it away from the pool.
No. The TOZO OpenEarRing has no stated waterproof rating, so it isn't designed for submersion. If you want pool audio, choose a bone conduction model rated IPX8.
Bluetooth uses the 2.4 GHz band, which water absorbs. Once you're submerged, the signal can't travel, so the S710 switches to onboard playback from its 8GB memory instead.
That's a core design consideration for the TOZO OpenEarRing. At 5.1g per bud with a clip-on shape, it's built to sit without clashing with glasses frames.
Generally yes. They vibrate bone rather than moving air, so low-end output is thinner than a dynamic driver like the 10mm unit in the TOZO. That's the trade you make for underwater capability.
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See also: open ear earbuds vs bone conduction, Generic Bone Conduction Headphones vs WARMLIFE Open-Ear Clip-On Earbud, FREEZE2TRIM Inductivv Bone Conduction vs Boytond Open Ear Earbuds