How We Research
We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
If you want a bone conduction headset you can actually swim in, with music stored on the device itself, choose Aiwa; if you need a comfortable, secure open-ear pair for gym work and outdoor training with stronger Bluetooth and a more customizable fit, choose PSIER Bone Conduction Headphones.
• Aiwa's biggest strength: IP68 waterproofing plus 8GB of built-in MP3 storage, so you can swim or train without a phone and without Bluetooth.
• Aiwa's biggest trade-off: No adjustable strap and no companion features beyond Bluetooth and the on-board storage; it's a purpose-built swim and workout tool.
• PSIER's biggest strength: A memory-titanium frame with an included adjustable strap, next-gen Bluetooth 6.0, and 13 mm drivers for a more tailored, connected everyday listen.
• PSIER's biggest trade-off: No on-board music storage and no IP68 submersible rating in the data, so it's a land-and-sweat headphone rather than a pool headphone.
• Pick Aiwa if you want one device for laps, long sessions, and phone-free playlists.
• Pick PSIER if you want an all-day open-ear headphone for the gym, running, and commuting with the latest Bluetooth.
The Aiwa Prodigy Swim is built around one clear idea: bone conduction sound that survives water. The IP68 rating means it's designed to be fully submerged and to shrug off sweat, dust, and rain, which is a rare combination in this category. And then there's the 8GB of built-in memory, which the data says holds up to roughly 2,000 songs directly on the headset. That single feature changes how you use it. You don't need a phone on the pool deck, you don't need a signal, and you don't need to worry about Bluetooth dropping out mid-lap.
Battery life is listed at up to 12 hours of continuous play, which covers long training blocks and multi-session days without a recharge. The open-ear design keeps your ears clear so you stay aware of traffic, other swimmers, or whatever is happening around you, and the bone conduction drivers cover a 20 Hz to 20,000 Hz range. Controls are touch-based, which is clean but worth knowing if you prefer physical buttons. It's available in red.
Who should buy it: swimmers first, then anyone doing heavy-sweat training who wants phone-free music. If you do laps, run in the rain, or want a headset that lives in your gym bag and never complains, this is the one to look at. Who should skip it: if you mainly want a headphone for casual listening, calls, or long days at a desk, the swim-first design and lack of an adjustable strap make it less flexible than a general-purpose open-ear pair. If you need a customized fit across different head sizes, the fixed ergonomic fit here is worth weighing carefully.
PSIER takes the opposite approach. Instead of chasing water, it chases comfort and connectivity. The frame is a flexible memory-titanium design that's meant to contour to your head without squeezing, and PSIER includes an adjustable strap so you can dial the fit in for different head sizes. That's a real advantage for longer sessions, because a stable fit that doesn't clamp down is what keeps open-ear headphones wearable for hours.
The audio side is more substantial on paper too: large 13 mm bone conduction drivers with 90 dB sensitivity, tuned for crisp treble and detailed mids. PSIER also claims its acoustic sealing cuts sound leakage by up to 50%, which matters if you've ever used open-ear headphones on a quiet train and felt self-conscious about what everyone else could hear. On connectivity, this runs Bluetooth 6.0 with roughly a 33 ft range and 60 ms low latency, so pairing is quick and audio stays in sync for video. Controls are physical push buttons rather than touch, which many people prefer mid-workout because you can feel your way to the right button.
The open-ear structure keeps you aware of your surroundings, and the design avoids ear-canal pressure while encouraging airflow. The enclosure uses ABS with titanium alloy memory wire, and it comes in green with a two-year warranty listed.
Who should buy it: gym-goers, runners, cyclists, and commuters who want one pair for everything on land. The adjustable strap and button controls make it a strong pick for sweaty, hands-busy sessions. Who should skip it: if swimming is your priority, the data here doesn't show an IP68 submersible rating or any built-in music storage, so it isn't the pool headphone. It also relies on your phone for audio, since there's no on-board memory.
Side-by-Side: Which Should You Choose?
• Best for swimming → Aiwa. IP68 waterproofing and full submersion are the whole point of the Prodigy Swim.
• Best for phone-free listening → Aiwa. 8GB of built-in storage holds up to about 2,000 songs, no phone required.
• Best for fit customization → PSIER. The memory-titanium frame plus an included adjustable strap tailors the fit to your head.
• Best for connectivity → PSIER. Bluetooth 6.0 with around a 33 ft range and 60 ms low latency is the more current wireless setup.
• Best for hands-busy workouts → PSIER. Push-button controls are easier to operate by feel than touch controls.
• Best for quieter environments → PSIER. The acoustic sealing design is claimed to reduce sound leakage by up to 50%.
• Best all-rounder for land training → PSIER. More flexible for gym, running, and everyday outdoor use.
In my opinion, this comes down to whether you get in the water. If you swim, or you want a headset that plays music with no phone and no Bluetooth involved, I'd buy the Aiwa Prodigy Swim — the IP68 rating, the 8GB of storage, and the 12-hour battery make it the more capable tool for that job. If you train on land and want the comfier fit, the more current Bluetooth, and physical buttons, I'd buy the PSIER. Two good headphones, two different jobs. Match the job to your routine and you'll be happy either way. Do check the current price on Amazon before deciding, since that's the one thing specs can't tell you.
how to bone conduction headphones work
Bone conduction drivers vibrate and send sound through your cheekbones to your inner ear, bypassing the ear canal. That's why both the Aiwa and PSIER headsets leave your ears fully open, so you hear your music and your surroundings at the same time. The Aiwa uses bone conduction drivers covering 20 Hz to 20,000 Hz; the PSIER uses 13 mm bone conduction drivers with 90 dB sensitivity.
how to wear bone conduction headphones
how to use bone conduction headphones
Power them on, pair over Bluetooth, and play from your phone — that's how the PSIER works, with Bluetooth 6.0 and push-button controls. The Aiwa works the same way over Bluetooth, but it also has 8GB of built-in storage for up to about 2,000 songs, so you can leave your phone behind and play straight from the headset.
Do these bone conduction headphones stay put during hard workouts?
The PSIER is built for that: a flexible memory-titanium frame for a stable, contoured fit with no squeeze, plus an included adjustable strap. The Aiwa uses a lightweight ergonomic open-ear design that rests securely around your head and ears. For sweat and rain, the Aiwa's IP68 rating is the more protective of the two.
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See also: iClever HS25 vs PSIER Bone Conduction Headphones, Aiwa vs Hamwesh Bone Conduction Headphones, Bandou 3.0 vs Arciea Bone Conduction Headphones