We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-09-23 · 6 min read · Independent comparison
If you want one pair of headphones you can actually wear in the water, choose Opinta Swimming Headphones; if you need earbuds that make your voice sound clear on calls and last through a whole week of workouts, choose PEFUPEW Earbuds.
• Opinta's biggest strength: a genuine IPX8 rating plus a built-in 32GB MP3 player, so it keeps playing music when Bluetooth physically cannot reach you underwater.
• Opinta's biggest trade-off: bone conduction trades deep, isolating bass for open-ear safety, and you have to remember to switch to MP3 mode before you get in the pool.
• PEFUPEW's biggest strength: a 40-hour total playtime with a dual LED battery display, ENC noise reduction for calls, and a lightweight 3g-per-bud in-ear fit.
• PEFUPEW's biggest trade-off: IP7 protects against sweat and rain, not submersion — these are land earbuds, not swimming earbuds.
• Choose Opinta if swimming, diving or sweaty outdoor training is your main activity and you want your ears open to traffic and surroundings.
• Choose PEFUPEW if you want everyday earbuds for the gym, commuting, calls and travel, with long battery life and a charging case.
The Opinta set is built around one problem that almost every pair of earbuds fails at: water. It carries an IPX8 waterproof rating, which the data sheet describes as usable to a depth of 3 metres without impact, even when submerged or under high water pressure. That is a different category of protection from splash resistance. It is designed to be worn in the pool, not just near it.
The clever part is the dual-mode design. Bluetooth signals do not travel through water, so Opinta pairs a Bluetooth 5.4 connection for dry-land use with a built-in 32GB memory card for underwater listening. You load your music, switch to MP3 mode before you get wet, and the headphones keep playing through your laps. The bone conduction driver sits outside your ear canal and vibrates through your cheekbone instead of plugging your ears, which means you stay aware of lane neighbours, pool staff and traffic. At 30g with a soft silicone build, and with an included adjustment strap for a tighter fit, it is aimed at long sessions rather than quick bursts. Battery is a 200mAh cell rated for up to 8 hours of playback or talk time, with a 2-hour charge, and the magnetic charging port needs to be dry before you plug in — a small habit worth building.
Who should buy it: swimmers, divers, open-water athletes, and runners or cyclists who want their ears uncovered for safety. The open design also means it will not fight with a swim cap, hat or glasses.
PEFUPEW Earbuds: Who It's For
PEFUPEW takes the opposite approach: a conventional in-ear bud, done thoroughly. Each bud weighs about 3 grams, uses a soft silicone tip and an ergonomic in-ear shape intended to reduce ear canal pressure. In practice that means you can wear them for a long gym session or a commute without the ache that heavier buds cause.
The spec sheet here is all about endurance and clarity. Bluetooth 5.4 handles the connection, with magnetic Hall-effect pairing so the buds reconnect the moment you lift them out of the case. The 14.2mm dynamic driver is on the large side for a bud this light, and the tuning is aimed at deep bass with crisp vocals — good for music that relies on low-end punch. The ENC noise reduction is the headline feature for talkers: it is rated to filter out 80% of background noise, which matters if you take calls from a busy street, an open office or a café. The charging case holds a 400mAh battery and extends total playtime to 40 hours, with 8 hours from a single charge and a 1.5 to 2-hour charge time. The dual LED display shows battery percentage from 0 to 100, so you are never guessing.
Two more practical details: the touch sensor is designed to cut down on accidental taps, and the IP7 nano-coating resists sweat and rain. Bluetooth range is listed at 15 metres, and they pair with iOS, Android, laptops and tablets.
Who should buy it: gym-goers, runners, commuters, cyclists and travellers who want one pair of earbuds for everything above ground — plus anyone who takes a lot of calls in noisy places.
Who should skip it: swimmers, and anyone who wants to hear their surroundings. In-ear buds seal your canal, and IP7 is sweat-and-rain protection, not a diving rating. Take these into the pool and you are outside what they were designed for.
Side-by-Side: Which Should You Choose?
• Best for call quality in noisy places → PEFUPEW Earbuds. ENC noise reduction is rated to filter 80% of background noise; Opinta has no equivalent call-clarity claim.
• Best for total battery life → PEFUPEW Earbuds. 40 hours with the charging case versus Opinta's 8 hours on a single charge.
• Best for a single long session → close call, but Opinta. Both are rated 8 hours, and Opinta's 200mAh cell covers an unusually long pool or trail day without a case.
• Best for situational awareness → Opinta Swimming Headphones. Bone conduction leaves your ear canal open, which is safer on roads and shared lanes.
• Best for storage without a phone → Opinta Swimming Headphones. The built-in 32GB memory card means you can leave your phone in the locker.
• Best for all-day comfort in the gym → PEFUPEW Earbuds. 3g per bud with an in-ear shape built to reduce canal pressure.
• Best for knowing your battery level → PEFUPEW Earbuds. The dual LED display shows a 0–100% figure at a glance.
In my opinion these two barely compete — they solve different problems, and the right one depends entirely on whether you get wet. If you swim, dive or train in water, I would buy the Opinta Swimming Headphones: IPX8 to 3 metres, a 32GB card for underwater playback, and an open-ear design that keeps you aware of what is around you. The trade-offs are real — no Bluetooth underwater, no sealed bass — but nothing about the PEFUPEW design suggests it belongs in a pool. If your workouts are on dry land and your priority is calls, battery and comfort, I would buy the PEFUPEW Earbuds instead. Check the current price on Amazon before you commit.
FAQ
No. They carry an IP7 rating described as sweat and rain resistance, which is a land-use standard. They are suited to cycling, hiking, running and travel — not submersion.
On a single charge they are rated the same at up to 8 hours. The difference is the case: PEFUPEW's 400mAh charging case extends total playtime to 40 hours, while Opinta runs on its own 200mAh battery and a 2-hour charge.
Yes. They are listed as compatible with most Bluetooth devices including iOS and Android phones, laptops and tablets, with a stated Bluetooth range of 15 metres.
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