How We Research
We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
If you want to swim with music playing in your ears and leave your phone on the pool deck, choose MARLALL Liquid Silicone Swimming; if you need all-day battery life, next-gen Bluetooth and a secure fit for running and cycling on land, choose PSIER Bone Conduction Headphones. Those two sentences cover 90% of this decision. The rest of this page explains the other 10%.
• MARLALL Liquid Silicone Swimming — biggest strength: IP68 waterproofing plus 32 GB of built-in MP3 memory, which means it keeps playing underwater where Bluetooth physically cannot reach. That's the whole point of this model.
• MARLALL Liquid Silicone Swimming — biggest trade-off: No battery figure is published, no fast-charging detail, and no low-latency spec. It's a swim-first tool, not a spec-sheet champion.
• PSIER Bone Conduction Headphones — biggest strength: 10 hours of playtime, roughly 2-hour Type-C charging, 200-hour standby, Bluetooth 6.0 and a declared 60 ms low-latency mode. It's built for long sessions on land.
• PSIER Bone Conduction Headphones — biggest trade-off: IPX5 only. Sweat and rain are fine; the manufacturer explicitly states it is not suitable for underwater use. That single line rules it out for swimming.
• Who each pick is for: MARLALL for pool and open-water swimmers who want audio without a phone nearby. PSIER for runners, cyclists and gym-goers who want maximum uptime and the newest Bluetooth standard.
The MARLALL S800 is a bone conduction headphone that solves a problem most bone conduction models ignore: water. It carries an IP68 rating, which is the highest protection class in this comparison, and it pairs that with 32 GB of on-board storage for MP3 playback. The manufacturer notes that you can store roughly 8,000 songs in that space. More importantly, the description states plainly that you should switch to MP3 mode when swimming, because Bluetooth signals cannot transmit underwater. That's not a limitation of this brand — it's physics. Water blocks the 2.4 GHz signal, so any swim headphone that claims Bluetooth underwater is either exaggerating or routing the signal in a way you won't notice until you dive.
Buy it if you swim laps, train in open water, or do water sports and want your own soundtrack without leaving a phone on the deck. Skip it if you mainly want a land-based headphone with a long published battery runtime — MARLALL doesn't state one, and PSIER states 10 hours plainly. Also skip it if you need noise cancellation; the noise control field on this model is listed as none, same as its rival.
PSIER Bone Conduction Headphones: Who It's For
The PSIER X13 is the more conventional — and frankly more polished — bone conduction headphone of the two. Its headline number is 10 hours of playtime, backed by roughly 2 hours to full charge over Type-C and a 200-hour standby figure. If your typical week is a daily 45-minute run plus a couple of longer weekend rides, that's a charge-once-a-week device. The 200-hour standby also means it won't be dead when you grab it after a few days off, which is a real annoyance with cheaper open-ear models.
On the audio side, PSIER leans into hardware: 13 mm drivers, 90 dB sensitivity, 10 ohm impedance, and a fully enclosed cavity design that the brand says cuts sound leakage by up to 50%. Bigger drivers and higher sensitivity generally mean more usable volume at lower power draw, which is part of how it reaches those 10 hours. Bluetooth is 6.0 with a 33-foot range and a declared 60 ms low-latency figure — that's the number that matters if you're watching video on a phone or tablet and don't want lip-sync drift.
The fit story is memory-titanium: a flexible frame that contours to your head rather than clamping it, plus an included adjustable strap for different head sizes. At 23 g, it's lighter than the MARLALL's stated weight, and the open-ear design keeps your ear canals clear for traffic, trail users and gym announcements. Controls are physical push buttons, which I prefer over touch panels when my hands are sweaty or gloved. Color is matte black.
Buy it if you run, ride, lift, hike or commute and want long runtime, the newest Bluetooth version, low latency and a fit you can adjust. Skip it if you swim — IPX5 won't survive it, and there's no on-board memory to fall back on when Bluetooth drops out.
Side-by-Side: Which Should You Choose?
• Best for swimming → MARLALL Liquid Silicone Swimming. IP68 plus 32 GB MP3 memory is the only combination here that works underwater.
• Best battery life → PSIER Bone Conduction Headphones. 10 hours playtime, 200 hours standby, about 2 hours to charge.
• Best for running and cycling → PSIER Bone Conduction Headphones. Lighter at 23 g, memory-titanium frame, adjustable strap, IPX5 handles sweat and rain.
• Best for leaving your phone behind → MARLALL Liquid Silicone Swimming. Internal storage means no paired device required at all.
• Best Bluetooth spec → PSIER Bone Conduction Headphones. Bluetooth 6.0 versus 5.4, plus a stated 60 ms low-latency mode.
• Best for video and gaming on a phone → PSIER Bone Conduction Headphones. The low-latency figure is the relevant spec; MARLALL doesn't publish one.
• Best for hearing your surroundings → either one. Both are open-ear bone conduction designs, so neither plugs your canals. Neither offers noise cancellation.
• Best for a multi-sport athlete → MARLALL Liquid Silicone Swimming, if water is part of your rotation. If it isn't, PSIER is the more capable everyday headphone.
If I had to pick one, I'd buy the PSIER Bone Conduction Headphones. In my opinion it's the better all-rounder: 10 hours of runtime, Bluetooth 6.0, low latency, a memory-titanium frame and physical buttons cover the vast majority of what most people actually do — run, ride, lift and commute. The MARLALL only wins on one axis, but it wins it decisively, and that axis is the reason it exists. So: buy PSIER unless you swim. If you swim, buy MARLALL and don't think twice — no IPX5 headphone is going to survive a lap session, and no Bluetooth signal is going to reach you underwater anyway. Check the current price on Amazon for both before you commit, since that gap moves around more than the specs do.
MARLALL, without question. It's rated IP68 and has 32 GB of built-in memory so you can play music in MP3 mode underwater. PSIER is IPX5 and the manufacturer states it is not suitable for underwater use.
Yes. IPX5 covers sweat and rain, which is exactly what it's rated for. Just don't submerge it — no swimming, no shower, no rinsing it under a tap.
No. Both list noise control as none, and that's typical for bone conduction. The open-ear design is deliberate: you hear your music and your surroundings at the same time. That's a safety feature on roads and trails, not a defect.
Because Bluetooth can't transmit through water. MARLALL stores your files on board so playback doesn't depend on a wireless link once you're submerged. Load your music before you get in, switch modes, and swim.
No runtime figure is published for the MARLALL, so I can't compare them on that. PSIER states 10 hours of playtime, about 2 hours to full charge and 200 hours of standby. If battery certainty matters to you, that's a point in PSIER's favor.
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