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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
• Opinta's biggest strength: IPX8 waterproofing rated for use down to 3 meters underwater, plus a claimed 8 hours of playback from a 200mAh battery and a 30g open-ear build.
• Opinta's biggest trade-off: It leans on a magnetic charging port that has to be bone-dry before you plug in, and it ships in a single orange color.
• KESIEME's biggest strength: A wraparound titanium frame at 37g, active noise cancellation, and a bundle that includes swimming earplugs, a storage bag and a cable.
• KESIEME's biggest trade-off: Its stated underwater depth tops out at 2 meters, which is shallower than Opinta's, and its battery wording is a little inconsistent across the listing.
• Who each is for: Opinta suits swimmers who go deeper and want one long session per charge; KESIEME suits pool and open-water swimmers who want a bundled, low-fuss kit with noise cancellation.
The Opinta set is built around one clear idea: keep the music going while you're actually submerged. The IPX8 rating here is stated for use down to 3 meters, and the brand explicitly says the set handles sweat, rain, dust and high water pressure. That's the kind of spec sheet that matters if you're diving off a block, doing underwater turns, or training in a lane where your head spends real time below the surface.
The other headline is the dual-mode setup. Opinta pairs Bluetooth 5.4 for dry-land use with a built-in 32GB memory card for MP3 playback, and the warm-tips section is refreshingly blunt: Bluetooth signals don't travel through water, so you switch to MP3 mode before you get wet. That's not a flaw, it's just how bone conduction and Bluetooth work — but Opinta says it plainly, which I appreciate. Around 32GB is a lot of room for podcasts and playlists without ever touching your phone.
Comfort-wise, the 30g open-ear design uses soft silicone, and the brand points out that it won't fight with hats or glasses. That's a real-world detail that matters more than it sounds, because goggles and swim caps already crowd your head. Battery is quoted at up to 8 hours of playback or talk time with a 2-hour charge, and there's an adjustment strap in the box if the frame runs large on you.
Who should buy it: swimmers who train deep, anyone who wants a single long session per charge, and people who want an open-ear fit that plays nice with other gear. Who should skip it: anyone who wants a specific color other than orange, and anyone who'd rather not remember to dry a magnetic port before every charge.
KESIEME takes a slightly different angle. The frame is a wraparound titanium design, and at 37g it's a touch heavier on paper than the Opinta, but the shape is meant to hug your head rather than clamp your ears. The ear placement is listed as open ear, and the enclosure is plastic — so this is a lightweight sport-first build, not a premium-feeling one.
Its waterproofing is also IPX8, but the stated depth is 2 meters rather than 3. For most pool swimmers, that's plenty. If you're doing surface laps, kick sets, or open-water swims, you'll never notice the difference. If you're regularly diving to the bottom of a deep pool, it's worth thinking about.
Where KESIEME pulls ahead on features is in two places. First, it lists active noise cancellation with push-button controls, which the Opinta sheet doesn't mention at all. Second, the bundle is genuinely more complete: a cable, a storage bag, swimming earplugs, the headphones and a manual. Earplugs are an underrated inclusion — bone conduction sends sound through your cheekbones, so blocking your ear canals keeps water out without killing the music.
The audio side lists a 15mm bone conduction driver and 16-ohm impedance. Battery is a 200mAh cell, and the listing says 6–8 hours of continuous music, then separately mentions 10+ hours at 60% volume — those two numbers don't quite line up, so I'd treat the 6–8 hour figure as the realistic one. Charging is Type-C, full in about 2 hours, which is the more convenient port of the two.
Who should buy it: pool and open-water swimmers who want earplugs and a carry bag included, anyone who values active noise cancellation, and buyers who prefer USB-C charging. Who should skip it: deep divers who need the extra meter of depth, and anyone who wants a color other than black.
• Best for deeper swimming → Opinta Swimming Headphones, with IPX8 stated to 3 meters versus KESIEME's 2 meters.
• Best for the pool and surface laps → KESIEME Swimming Headphones, where the 2-meter rating is more than enough.
• Best for battery life → Opinta Swimming Headphones, at a clean 8 hours of playback per 2-hour charge.
• Best for charging convenience → KESIEME Swimming Headphones, because Type-C beats a magnetic port you have to dry first.
• Best for noise control → KESIEME Swimming Headphones, since it lists active noise cancellation and Opinta's sheet doesn't.
• Best for accessories out of the box → KESIEME Swimming Headphones, which includes earplugs, a storage bag and a cable.
• Best for a lighter, simpler fit → Opinta Swimming Headphones, at 30g with soft silicone and an adjustment strap in the box.
• Best for storage capacity tie → both, since each carries a 32GB built-in memory card and Bluetooth 5.4.
In my opinion, the Opinta is the better pick for the swimmer who takes the "swimming headphones" label literally. The 3-meter depth rating, the honest MP3-mode guidance, the 8-hour runtime and the 30g build all point at someone who swims hard and wants one charge to cover it.
I'd steer toward KESIEME if you swim mostly at the surface, want earplugs and a bag in the box, and would rather charge over USB-C than babysit a magnetic port. If you can't decide, pick based on depth and accessories — those are the two differences you'll actually feel. Check the current price on Amazon for each before you commit, since that's the one variable I can't compare here.
Opinta states IPX8 protection to 3 meters, while KESIEME states 2 meters. Both require MP3 mode underwater because Bluetooth can't transmit through water.
No. Neither brand supports Bluetooth transmission in water. You load music onto the built-in 32GB memory and switch to MP3 mode before you get in.
Opinta claims up to 8 hours of playback or talk time. KESIEME lists 6–8 hours continuous and also mentions 10+ hours at 60% volume, which is inconsistent — so Opinta's figure is the more straightforward one.
KESIEME ships with a cable, storage bag, swimming earplugs, headphones and a manual. Opinta includes an adjustment strap so you can tighten the fit if the frame feels loose.
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