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We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-10-03 · 7 min read · Independent comparison
• sprtoybat Earbuds — biggest strength: up to 68 hours of total playtime, IPX7 waterproofing, and a 15-meter Bluetooth 5.4 range with a charging case that refills the buds 8–9 times.
• sprtoybat Earbuds — biggest trade-off: it's still a Bluetooth in-ear product. Submerge it and the signal is gone, and IPX7 is rated for sweat, rain and splashes rather than swimming.
• Opinta Swimming Headphones — biggest strength: IPX8 waterproofing rated to 3 meters of depth, plus a built-in 32GB memory card so audio plays from local storage instead of a phone.
• Opinta Swimming Headphones — biggest trade-off: you have to remember to switch into MP3 mode before getting in the water, and battery life is a fraction of what the sprtoybat case delivers.
• Who sprtoybat Earbuds are for: runners, lifters and commuters who want one pair of earbuds for the gym, the office and the bus.
• Who Opinta Swimming Headphones are for: lap swimmers, divers and open-water athletes who want music in the pool without a phone nearby.
The sprtoybat Q38 is built around stamina. The buds themselves run up to 8 hours on a single charge, and the charging case adds roughly eight to nine more top-ups for a combined figure of up to 68 hours. The case holds an 800mAh battery and recharges over Type-C in about 2 hours, and a 10-minute top-up is quoted as good for 2 hours of music. In practice that means you can throw them in a bag on a Sunday and not think about a charger again until the following weekend.
Comfort is handled with flexible TPU ear hooks and three sizes of silicone tips (S/M/L), which is the right approach for anything involving movement. Hooks keep the bud anchored while tips seal the canal, so running, cycling and gym work shouldn't dislodge them. Add IPX7 waterproofing and these are fine with heavy sweat, rain and the occasional rinse. The audio side uses 14.2mm dual-layer graphene drivers with a dynamic driver design, and the built-in ENC microphone is quoted as cutting background noise by around 75% for calls. Bluetooth 5.4 with a 15-meter range covers the usual phone-in-one-room, earbuds-in-another situation, and touch controls handle playback, volume, calls and voice assistant.
Who should buy it: anyone whose workout is dry. Runners, gym-goers, cyclists, people who take calls between sets, and anyone who wants universal compatibility across iOS, Android, laptops and tablets. I'd steer you here if you want one pair of earbuds to cover work, travel and training.
Who should skip it: swimmers. IPX7 protects against immersion for a short time in shallow water, but this is a Bluetooth earbud, and Bluetooth does not travel through water. If lap swimming is your main activity, the sprtoybat is the wrong tool.
The Opinta X7 Pro solves a problem most earbuds can't: audio while submerged. It carries IPX8 waterproofing and is described as usable to 3 meters of depth, tolerating submersion and high water pressure. The catch is stated plainly in the specs: Bluetooth can't transmit underwater, so you switch to MP3 mode. That's where the built-in 32GB memory card earns its keep — load your music onto the headset and it plays without any connection to your phone at all.
The design is bone conduction and open-ear, made from soft silicone and weighing 30g. Sound reaches you through vibration rather than a sealed canal, which means your ears stay open and you keep awareness of your surroundings. It also means the headset sits around the head rather than inside it, so it won't fight with a swim cap, hat or glasses. The spec sheet notes an adjustment strap in the box for anyone who finds the fit loose. Controls are physical buttons — mode switching, play/pause, track skipping and call answering — which is the sensible choice when your hands are wet and touch panels get unreliable.
Battery is a 200mAh cell with up to 8 hours of playback or talk time and a 2-hour charge. Charging is magnetic, and the manufacturer explicitly warns you to dry the port before connecting, which is worth respecting on any waterproof device. Bluetooth 5.4 is on board for dry-land use: running, cycling, hiking, driving. Sound is tuned with an emphasis on low frequency and a hydrodynamic interference function for underwater listening.
Who should buy it: swimmers first and foremost, plus divers, triathletes and anyone who trains in water. In my opinion, if you do laps three times a week, this is the category you should be shopping in. The open-ear design also appeals to runners who want traffic awareness.
Who should skip it: people who want a single everyday pair for calls, video and music on a phone. The MP3 workflow means managing files, the battery is a third of the sprtoybat's total, and bone conduction trades bass depth for safety and comfort.
Side-by-Side: Which Should You Choose?
• Best for swimming → Opinta Swimming Headphones. IPX8 to 3 meters with a 32GB local library versus IPX7 splash protection on a Bluetooth signal.
• Best for phone calls → sprtoybat Earbuds. A dedicated ENC microphone quoted at 75% background noise reduction, plus touch controls.
• Best for awareness and safety outdoors → Opinta Swimming Headphones. Open-ear bone conduction leaves your ears uncovered.
• Best for charging convenience → sprtoybat Earbuds. A Type-C case that refills the buds 8–9 times, with a 10-minute quick charge for 2 hours of playback.
• Best for wearing with a hat or glasses → Opinta Swimming Headphones. The 30g around-the-head design avoids ear-canal pressure and sits clear of headwear.
• Best for one-pair-does-everything → sprtoybat Earbuds. Universal pairing across iOS, Android, laptops and tablets with no file management.
• Best for hands-free wet conditions → Opinta Swimming Headphones. Physical multi-function buttons beat touch surfaces when your fingers are wet.
I'd buy the sprtoybat Earbuds. Most people searching these two names want earbuds for running, the gym and daily listening, and the sprtoybat covers far more of that ground: 68 hours of total playtime, IPX7 protection, an ENC mic for calls, and a case small enough to forget in a pocket. The Opinta is genuinely better at one thing — being underwater — and if swimming is your sport, that one thing outweighs everything else. Buy the Opinta for the pool. Buy the sprtoybat for everywhere else.
No. They're rated IPX7, which covers sweat, rain and brief immersion, but they're Bluetooth earbuds and Bluetooth doesn't travel through water. For swimming, the Opinta's IPX8 rating and MP3 mode are the appropriate choice.
Do the Opinta Swimming Headphones work like normal Bluetooth headphones?
Yes, on land. They support Bluetooth 5.4 for running, cycling, hiking and calls. Underwater you must switch to MP3 mode and play from the built-in 32GB memory, since Bluetooth can't transmit through water.
They suit different ears. The sprtoybat uses flexible TPU hooks and three tip sizes to lock into the ear canal. The Opinta is a 30g open-ear bone conduction headset that avoids canal pressure entirely and won't interfere with hats or glasses.
If your budget allows only one, pick based on your primary activity. Swimmers should take the Opinta; everyone else gets more day-to-day value from the sprtoybat. Check the current price on Amazon before deciding.
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