How We Research
We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-09-29 · 6 min read · Independent comparison
• SilisoundTek's biggest strength: bone conduction drivers sit on your cheekbones instead of inside your ears, so you stay fully aware of cars, bells and fellow riders — the single most important trait for cycling earbuds.
• SilisoundTek's biggest trade-off: bone conduction never isolates you from noise, and the open fit means less thump in the low end than a sealed in-ear design.
• Acjohtin's biggest strength: up to 90 hours of total playback with the charging case and an 8-hour single-charge run, plus over-ear hooks that lock in place during hard efforts.
• Acjohtin's biggest trade-off: they're in-ear, so they block out the road around you — great for focus, risky on open roads.
• Pick SilisoundTek if your rides are on streets, trails shared with pedestrians, or anywhere you need your ears open. Pick Acjohtin if you want marathon battery, punchy bass and a hooked fit for long training blocks.
The SilisoundTek S800 is built around an open-ear idea: sound travels through your cheekbones, nothing enters your ear canal. For a cyclist, that's the whole point. You hear the drivetrain, the traffic behind you and the shout from a rider you're about to pass. In my opinion, that situational awareness is worth more on a bike than any bass boost. The wrap-around titanium alloy frame is rated to bend 360° without deforming, and at 32 g it's light enough that a helmet strap and glasses don't fight it. The frame wraps behind your head rather than hooking over the ear, which is a different feel from traditional sport buds.
On the spec sheet, IPX8 is the headline. That's a genuinely high water-resistance rating — sweat, rain and heavy spray are all in scope. One caveat from the data: it is not intended for swimming, even though the description mentions underwater MP3 use with the included earplugs. Treat it as a foul-weather and heavy-sweat headphone first. Battery is a 230 mAh cell with 8–10 hours of playback and a 1.5-hour charge via a magnetic cable, and Bluetooth 5.3 covers a 10-meter range with multi-pairing. There's a hybrid noise-cancellation claim and a noise-canceling mic for calls, plus button and voice control. Bone conduction mics are naturally exposed to wind, so keep call expectations realistic on a fast descent.
Who should buy it: commuters and road cyclists who ride in traffic, runners on shared paths, and anyone who finds in-ear tips uncomfortable or unhygienic over long sessions. It's also a sensible pick for riders who wear one earbud out for safety anyway — this design just makes that the default. Who should skip it: anyone who wants to be sealed off from the world, wants deep sub-bass, or plans to swim laps. If isolation is your priority, this is the wrong tool.
The Acjohtin YYK-Q15 goes the opposite direction and does it well. These are true wireless in-ear buds with flexible silicone over-ear hooks and S/M/L tips, so the fit is adjustable and the hook keeps them locked during sprints, climbs and rough pavement. For cycling earbuds, that hook matters: a bud that pops out at 25 km/h is gone forever. The in-ear seal also gives you passive noise blocking, which is exactly what you want on a trainer, on a closed circuit, or on a commute where you'd rather not hear the world.
The battery story is the standout. Acjohtin claims up to 90 hours of total playback with the charging case and 8 hours from a single charge, with an LED digital display showing levels for both the buds and the case. For a week of commuting or a multi-day training block, that's genuinely convenient — you're not hunting for a cable every night. Connectivity is Bluetooth 6.1 with a 33 ft range and low-latency tuning for audio and gaming. Four microphones with ENC noise reduction are rated to cut up to 45 dB of background noise on calls, which is a meaningful step up from a single-mic setup if you take meetings from the bike or the gym.
Sound is driven by 16.2 mm dynamic drivers — large for this category — which is where the punchy bass and balanced midrange claims come from. IPX7 handles sweat, splashes and light rain. Touch controls cover play/pause, volume, calls and voice assistants. Warranty is listed at two years.
Who should buy it: riders who train hard and want immersive sound, long battery and a fit that won't budge. Also a good match for gym work, treadmill sessions and commutes where you want the outside world turned down. Who should skip it: road cyclists in live traffic, and anyone who dislikes the plugged-ear feeling or needs to stay aware of their surroundings.
Side-by-Side: Which Should You Choose?
• Best for cycling safety and awareness → SilisoundTek Bone Conduction Headphones. Open ears, no seal, traffic audible.
• Best for battery life → Acjohtin Earbuds. Up to 90 hours total with the case versus 8–10 hours on a single SilisoundTek charge.
• Best for the wettest, sweatiest conditions → SilisoundTek Bone Conduction Headphones. IPX8 versus IPX7.
• Best for call clarity in noisy places → Acjohtin Earbuds. Four mics with ENC rated to cut up to 45 dB of background noise.
• Best for a fit that bends and adapts → SilisoundTek Bone Conduction Headphones. Titanium alloy frame rated for 360° flex, 32 g total.
• Best for long training blocks and multi-day trips → Acjohtin Earbuds. The LED case display and 90-hour total make charging a once-a-week chore.
• Best for riders who wear glasses or helmets all day → SilisoundTek Bone Conduction Headphones. Nothing sits inside the ear canal, so there's no pressure build-up.
For cycling specifically, I'd buy the SilisoundTek Bone Conduction Headphones. The reason is simple: on a bike, hearing the road is a safety feature, and bone conduction bakes that in rather than asking you to remember to pull one bud out. IPX8 and the flexible titanium frame back it up for real weather and real movement. In my opinion the Acjohtin Earbuds are the better all-rounder — bigger battery, bigger bass, better call mics — and if your riding is mostly indoors, on closed paths, or you simply want the outside world muted, that's the one I'd point you to. Check the current price on Amazon for both before you decide, since that's the one variable that isn't in the spec sheets.
For riding in traffic, yes in my opinion — bone conduction leaves your ear canal open so you hear cars, horns and other riders. In-ear buds like the Acjohtin seal you off, which is safer indoors or on closed routes but riskier on open roads.
How long do the SilisoundTek headphones last on one charge?
The data sheet lists a 230 mAh battery with 8–10 hours of music and call time, and a 1.5-hour charge via the magnetic cable. That's a full day of commuting or a long ride, but well short of the Acjohtin's 8-hour single-charge and 90-hour total with the case.
Yes — they're rated IPX7, which covers sweat, splashes and light rain. The SilisoundTek pair goes a step further at IPX8, but neither is designed for swimming, so don't plan on laps with either.
The Acjohtin Earbuds have the edge on paper: four microphones with ENC noise reduction rated to block up to 45 dB of background noise. The SilisoundTek pair uses a noise-canceling mic, but an open bone conduction design naturally picks up more wind and ambient sound.
As an Amazon Associate I earn from qualifying purchases.
We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon and affiliated sites.
When you buy through links on this page, we may earn a commission from qualifying purchases at no extra cost to you.
Amazon and the Amazon logo are trademarks of Amazon or its affiliates. This site is an independent third-party review and is not affiliated with, endorsed by, or sponsored by Amazon or the product brands mentioned.
See also: Betron BS10 vs IMYB V8: Wired Headphones, vinamass Kids vs Owliwise Kids Headphones, Candy Bila Kids vs Botesty Sound Kids, Molufeibe Open Ear Earbuds vs eleror Invisible Mini Earbuds