We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-09-17 · 6 min read · Independent comparison
If you want a proven swimming-first design with certified waterproofing and a bigger offline music library, choose Roujune Swimming Headphones Bone; if you need longer battery life and a budget-friendly everyday training companion, choose KESIEME Swimming Headphones.
• Roujune's biggest strength: TÜV-certified IP68 sealing, a 32GB MP3 mode, and dual Bluetooth 5.4 device pairing — a headphones-first design built around swimming, not adapted for it.
• Roujune's biggest trade-off: An IP68 rating and certification cost you weight (27g on a titanium memory band), and Bluetooth still won't work underwater — you're locked into MP3 mode the moment your head goes under.
• KESIEME's biggest strength: Reliable 6–8 hours of playback with a 200mAh battery, Type-C fast charging, and active noise cancellation for dry-land training.
• KESIEME's biggest trade-off: At 37g on a wraparound titanium frame, it's heavier, and its IPX8 rating is stated without a certification body behind it.
• Choose Roujune if you swim laps, snorkel, or dive and want certification-grade waterproofing plus a large offline library.
• Choose KESIEME if you run, cycle, and train on land more than you swim, and want the longer battery runtime and ANC.
Roujune's X20 Pro is a bone conduction headphone built around one problem: making sound work when you're submerged. It does this with a patented vibration driver that pushes audio through your cheekbones instead of your eardrums, which keeps your ear canals open — the reason you can still hear a lane-mate or a passing car while wearing them. The headset carries a TÜV-certified IP68 waterproof rating, which is the strongest waterproofing claim in this comparison, and a claim backed by a third-party testing body rather than a self-declared number.
For swimming specifically, the design details matter. The seal is engineered to sit comfortably under swim caps and next to goggles, and the whole unit weighs 27g on a flexible titanium memory neckband wrapped in soft liquid silicone. That's light enough that the band holds position without clamping, and the open-ear fit means you're not fighting pressure against your skull every time you turn your head for a breath. Roujune also states the unit can be submerged to two meters for up to one hour — enough for a normal lap session, snorkeling, or shallow diving.
The real differentiator is storage. 32GB of onboard memory holds up to 8,000 songs, and MP3 mode runs without a phone at all. You double-press the power button to switch modes, and triple-press to toggle shuffle. Battery is rated at 6 hours in Bluetooth mode, with Bluetooth 5.4 giving a stable 10-meter connection and dual-device pairing so you can jump between a laptop and a phone.
KESIEME Swimming Headphones: Who It's For
KESIEME's X7s takes a slightly different angle: it's an open-ear bone conduction headphone that treats swimming as one of several sports, not the only one. The driver is a 15mm bone conduction unit with 16-ohm impedance, and it uses the same cheekbone-vibration approach — sound travels through the bone to the inner ear, so your ear canals stay open and you keep awareness of your surroundings. For outdoor training, that's the safety argument, and it holds up.
The X7s carries an IPX8 waterproof rating and, like the Roujune, it can play downloaded songs from its 32GB of built-in memory at depths up to two meters. KESIEME is upfront about the same limitation every bone conduction headphone shares: Bluetooth can't transmit through water, so you have to switch to MP3 mode before you submerge.
Where the X7s pulls ahead is runtime and charging. The 200mAh battery is rated for 6–8 hours of continuous music, and KESIEME states 10+ hours of music or calls at 60% volume. It charges over Type-C and reaches full in roughly two hours — a meaningful convenience compared to a proprietary magnetic cable, because you almost certainly already own a Type-C cable. It also offers active noise cancellation, which the Roujune does not list.
The trade-offs are real. At 37g it's noticeably heavier than the Roujune's 27g, and a heavier band is something you feel on longer sessions. It's also listed for adults, and the fit depends on a wraparound titanium frame rather than a memory band. The IPX8 rating is stated without naming a certifying body.
Buy it if you want one headset for running, cycling, gym work, and occasional swims, and you value battery life and Type-C charging. Skip it if you're a serious lap swimmer who wants a certified waterproofing claim and the lightest possible fit.
Side-by-Side: Which Should You Choose?
• Best for battery life → KESIEME Swimming Headphones. 200mAh with 6–8 hours rated, and up to 10+ hours at reduced volume.
• Best for offline music capacity → a tie. Both offer 32GB, enough for thousands of tracks without a phone.
• Best for charging convenience → KESIEME Swimming Headphones. Type-C charging beats a proprietary magnetic cable for everyday practicality.
• Best for lightest fit → Roujune Swimming Headphones Bone. 27g versus 37g is a real difference over a long session.
• Best for land-based training → KESIEME Swimming Headphones. Active noise cancellation and longer runtime suit running, cycling, and gym work.
• Best for multi-device switching → Roujune Swimming Headphones Bone. Bluetooth 5.4 with dual-device pairing between laptop and phone.
• Best for peace of mind on waterproofing → Roujune Swimming Headphones Bone. A third-party certified rating is more reassuring than a self-declared one.
If I were buying for myself, I'd take the Roujune Swimming Headphones Bone (X20 Pro) . In my opinion, certified IP68 waterproofing is the single most important spec on a swimming headphone, and Roujune is the only one here that names a certification body for it. Add the 27g weight and the dual-device Bluetooth 5.4, and it's the better tool for anyone who actually gets in the water. I'd pick KESIEME only if swimming is a small part of your training and battery life plus Type-C charging matter more. Either way, check the current price on Amazon before you commit.
Both are rated IPX8 and both can play from 32GB of built-in memory at up to two meters. Roujune's rating is TÜV-certified, which is the stronger waterproofing claim. Neither works over Bluetooth underwater — you must switch to MP3 mode first.
Do these swimming headphones work with Bluetooth underwater?
KESIEME, on paper. Its 200mAh battery is rated for 6–8 hours, with 10+ hours at 60% volume, versus Roujune's 6 hours. KESIEME also charges over Type-C in about two hours.
Yes — both are open-ear bone conduction designs, so you keep awareness of traffic and surroundings. KESIEME adds active noise cancellation and longer runtime; Roujune is lighter at 27g versus 37g.
I can't quote prices here, and both are priced independently of the specs above. Check the current price on Amazon for each, then weigh Roujune's certified IP68 and lighter fit against KESIEME's longer battery life.
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