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We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-09-22 · 7 min read · Independent comparison
• Opinta Swimming Headphones — biggest strength: a 200mAh battery rated for up to 8 hours of playback, paired with a 30g bone-conduction, open-ear build that keeps you aware of traffic and surroundings on land.
• Opinta Swimming Headphones — biggest trade-off: IPX8 sealing is rated to 3m, and there's no mention of a bundled waterproof bag or earplugs, so you manage the charging-port care yourself.
• Roujune Swimming Headphones Bone — biggest strength: IP68 waterproofing described as TÜV-certified, a 32GB MP3 player holding up to 8,000 songs, and a 2-year warranty.
• Roujune Swimming Headphones Bone — biggest trade-off: up to 6 hours of battery per charge, which is roughly two hours less than the Opinta on paper.
• Who each is for: Opinta suits swimmers who also train long and dry (running, cycling, marathons) and want the extra runtime. Roujune suits pool and open-water swimmers who care most about water sealing, song capacity and after-sales cover.
The Opinta X7 Pro is built around one idea: keep the music going whether you're in the water or on the road. It uses bone conduction drivers that sit outside the ear canal, so your ears stay open to what's around you — a real plus when you're cycling on a shared path or running near traffic. The housing is soft silicone and the whole thing weighs 30g, which is light enough that hats and glasses aren't pushed out of place.
The spec that stands out to me is the battery. A 200mAh cell rated for up to 8 hours of playback or talk time, with a 2-hour recharge via a magnetic charging port. If your week is a mix of swim sessions and longer weekend rides, that runtime is the difference between charging every day and charging every few days. The 32GB of built-in memory gives you a big offline library for MP3 mode, and Bluetooth 5.4 handles the dry-land hours.
Buy it if you want maximum playback time, a light open-ear fit, and one pair of headphones that covers swimming plus running and cycling. Skip it if you want the deepest-rated waterproofing, a bundled waterproof bag, or the longest warranty — those aren't where this model's strengths are.
Roujune Swimming Headphones Bone: Who It's For
The Roujune X20 Pro takes the opposite approach: it leans hard into the water. The IP68 rating is described as TÜV-certified with advanced sealing, and the stated use case is submersion up to two meters for one hour. That's a meaningful detail if you're doing repetitive laps with flip turns, where the unit gets dunked constantly rather than just splashed.
Storage is generous. The 32GB of internal memory is quoted as holding up to 8,000 songs, which is far more than most people will ever load. Mode switching is done with button presses: a double-press of the power button flips between Bluetooth and MP3, and a triple-press toggles sequential versus shuffle playback. Worth knowing — MP3 mode only reads files in MP3, WMA, FLAC, APE or WAV format, so if your library is in something else, convert it before you load the drive. If the unit won't stay in MP3 mode, the documented fix is a reset (hold the power button for 10 seconds).
Fit is where this one wins on paper for some buyers. It weighs 27g — slightly less than the Opinta — and uses soft liquid silicone with a flexible titanium memory neckband, which tends to hold shape around the back of the head. The description also notes it's comfortable alongside swim caps and goggles, which matters more than people expect. Bluetooth 5.4 gives a stable connection up to 10 metres with dual-device pairing, so you can hop between a laptop and a phone, and battery life is up to 6 hours. The box includes an adjustment strap, a magnetic charging cable, waterproof earplugs and a waterproof bag — the earplugs and bag are genuinely useful extras for pool work.
Buy it if you swim seriously, want the deepest waterproofing rating and the longest warranty (2 years), and value having a waterproof bag and earplugs included. Skip it if you need the longest possible runtime between charges or you mostly want these for long dry-land sessions.
Side-by-Side: Which Should You Choose?
• Best for waterproofing depth → Roujune Swimming Headphones Bone. IP68 described as TÜV-certified and rated to 2m for one hour, versus IPX8 to 3m on the Opinta. Both are strong; the Roujune has the certification claim behind it.
• Best for song capacity → Tie. Both offer 32GB. The Roujune quotes up to 8,000 songs, which gives you a sense of scale for either one.
• Best for lighter weight → Roujune Swimming Headphones Bone. 27g versus 30g. A small gap, but noticeable over a long session.
• Best for multi-device switching → Roujune Swimming Headphones Bone. Bluetooth 5.4 with dual-device connection and a 10m range, so moving between laptop and phone is straightforward.
• Best for mixed swim-and-run training → Opinta Swimming Headphones. The longer runtime and open-ear safety design suit back-to-back sessions without a mid-day recharge.
• Best for included accessories → Roujune Swimming Headphones Bone. Waterproof earplugs and a waterproof bag ship in the box; the Opinta includes an adjustment strap.
• Best for warranty cover → Roujune Swimming Headphones Bone. 2 years versus 1 year on the Opinta.
If I were buying for myself and my priority was pool swimming — laps, flip turns, a wet bag in my gym locker — I'd take the Roujune Swimming Headphones Bone. The IP68 certification, the 2m/one-hour submersion rating, the bundled waterproof bag and earplugs, and the 2-year warranty all point at a product designed first and foremost for water. The 6-hour battery is enough for a normal week of sessions.
I'd pick the Opinta Swimming Headphones instead if my training is mixed. The 8-hour runtime and 30g open-ear design make it the better single pair for someone who swims twice a week and runs or rides on the other days. In my opinion, that's the deciding question: water-first, or all-rounder.
FAQ
No — and this is true of both. Bluetooth signals don't transmit through water, so you have to switch to MP3 mode before entering the pool. The Opinta uses a multi-function button to change modes; the Roujune uses a double-press of the power button.
The Opinta is rated for up to 8 hours of playback or talk time on a 200mAh battery, with a 2-hour charge. The Roujune is rated for up to 6 hours. If long sessions or multi-day use between charges matter to you, the Opinta is the stronger pick.
I can't quote prices here, and both listings change over time. Check the current price on Amazon using the button on this page, then weigh it against what you actually need: 8-hour battery and a mixed-training fit (Opinta) versus IP68 certification, a 2-year warranty and included waterproof accessories (Roujune).
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See also: FANVERIM 3'2 vs QMHL Swimming Headphones-Bone Conduction, Hupoaf Earbuds Sport vs Opinta Swimming Headphones, bone conduction headphones for swimming