We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-09-21 · 7 min read · Independent comparison
If you want a single pair of open-ear headphones you can actually swim with — and that keeps playing music with no phone anywhere near the pool — choose mojawa Purra Swim Bone; if you need marathon battery life and a bendable neckband built for long workouts, commutes and calls on land, choose MZQYRVK Neckband. Those two sentences are basically the whole article. Everything below is me explaining why I'd pick each one, and which one I'd hand to which kind of buyer.
• mojawa Purra Swim Bone — biggest strength: IP68 full waterproofing plus 32GB of built-in storage, so it works as a standalone MP3 player underwater where Bluetooth simply doesn't reach.
• mojawa Purra Swim Bone — biggest trade-off: It's an open-ear bone conduction design, so you give up in-ear isolation, and its 15-hour battery is modest next to the neckband's claimed endurance.
• MZQYRVK Neckband — biggest strength: A 1000mAh battery rated for roughly 100 hours of playback and 150 hours of call time, with a flexible silicone neckband that stays put during runs.
• MZQYRVK Neckband — biggest trade-off: Its water resistance isn't stated as an IP rating, and there's no built-in storage — TF card expansion needs a card you supply, so it can't swim in the pool the way the mojawa can.
• Buy the mojawa if you swim, shower or train in rain and want music without your phone.
• Buy the MZQYRVK if you want the longest possible time between charges for gym, running, work and calls.
The Purra Swim Bone is built around one idea: music that doesn't need your phone, in places your phone shouldn't go. It carries 32GB of internal storage and plays MP3, WAV, AAC, FLAC, M4A and APE files, which you load over a magnetic data cable and organise through the MOJAWA app. That matters because underwater, Bluetooth is useless. The mojawa solves it with a dual-mode switch — Bluetooth for daily life, offline MP3 mode the moment you go under. In my opinion that single design decision is what makes it a swimming headphone rather than a "water-resistant" headphone that you're nervous about.
Who should buy it: swimmers first, then anyone who wants one headphone for pool, run, bike and gym, and who'd rather not carry a phone. Who should skip it: if you want deep, sealed bass in your ears, or you hate the open-ear feel, this isn't the shape for you. The same goes if you want extreme battery life — 15 hours is fine for a week of workouts, but it's not a month.
MZQYRVK Neckband: Who It's For
The MZQYRVK Neckband plays a completely different game. Its headline is endurance: a 1000mAh polymer battery rated for around 100 hours of continuous music and up to 150 hours of call time, with a full charge in about an hour over Type-C. If you're the type who charges headphones on a whim and then curses them mid-run, that number is the whole reason to buy this thing. It also travels well — the battery is described as air-travel certified, which is a small detail that tells you who MZQYRVK is aiming at: commuters, travellers, people on long calls.
The audio side uses a 10mm carbon black graphene diaphragm driver, tuned for rich bass, clear mids and crisp treble, and positioned for pop, rock, classical and podcasts. It's an in-ear design with a passive noise-cancelling fit, so you get physical isolation from the eartips, plus an ENC chip on the mic side that filters wind and background chatter for calls on streets, trains or in the gym. Bluetooth 5.3 handles pairing with iOS, Android, laptops and tablets, and latency is listed at 150 milliseconds — a touch quicker on paper than the mojawa's 200ms, which is nice for video and casual gaming.
The neckband itself is soft memory silicone that bends however you like, with anti-drop ear hooks to keep the buds in during running and cycling. There's also a hidden TF card slot supporting up to 32GB, so it can act as a standalone player — but note that's expansion you provide, not storage that's already inside. Who should buy it: runners, gym-goers, commuters and anyone who lives in calls and wants to charge rarely. Who should skip it: swimmers. There's no stated IP rating here, so treating it as a pool headphone would be a leap the specs don't support.
• Best for swimming → mojawa Purra Swim Bone. IP68 immersion plus MP3 mode is a combination the MZQYRVK simply doesn't offer.
• Best for battery life → MZQYRVK Neckband. Roughly 100 hours of playback versus 15 on the mojawa is not a close contest.
• Best for calls → MZQYRVK Neckband. ENC noise reduction plus up to 150 hours of call time is built for people who talk for a living.
• Best for music without a phone → mojawa Purra Swim Bone. 32GB is already inside; the MZQYRVK needs a TF card you supply, capped at 32GB.
• Best for bass and isolation → MZQYRVK Neckband. A 10mm graphene in-ear driver with a sealed fit will feel fuller than an open-ear bone conduction design.
• Best for staying aware of your surroundings → mojawa Purra Swim Bone. Open-ear means your ears stay open, which matters on roads and in shared lanes.
• Best for charging convenience → MZQYRVK Neckband. One hour to full, and you won't be reaching for the cable often.
• Best all-rounder for land sports → MZQYRVK Neckband. Anti-drop hooks, a bendable band and long runtime fit gym and running better than pool duty.
If I could only buy one, I'd buy the mojawa Purra Swim Bone. In my opinion it's the more specialised, harder-to-replace product: no other feature set here gets music into a pool without a phone, and the IP68 rating plus 32GB of internal storage is a genuinely different capability rather than a bigger number. The MZQYRVK Neckband is the smarter buy for most land-based athletes and commuters, and its battery life is outstanding — but battery life is easy to work around with a charge, and swimming is not something you can work around with a spec sheet. If you split your training between the pool and the pavement, start with the mojawa.
Yes — it carries an IP68 full waterproof rating, which is an immersion rating, and it has a dedicated offline MP3 mode precisely because Bluetooth doesn't work underwater. That combination is what makes pool and open-water use realistic.
I wouldn't plan on it. The specs list no IP waterproof rating for the MZQYRVK, so there's nothing to justify submerging it. It's aimed at running, cycling, gym and commuting, and it does that job well.
The MZQYRVK Neckband, by a wide margin. It's rated for roughly 100 hours of playback and 150 hours of calls from a 1000mAh battery, against up to 15 hours on the mojawa. If charging frequency annoys you, that gap is the deciding factor.
The mojawa can play entirely on its own thanks to 32GB of built-in storage. The MZQYRVK can also work standalone, but only if you add a TF card up to 32GB yourself. Otherwise both stream over Bluetooth 5.3.
I can't quote prices here, and they move around anyway. Check the current price on Amazon using the button on this page, then weigh it against which capability you actually need — pool-proof storage or month-long battery life.
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