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We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-09-25 · 6 min read · Independent comparison
• Pmjebe Bone Conduction Swimming — biggest strength: IP68/IPX8 waterproofing plus a built-in 8GB MP3 player, so it works underwater and without a phone.
• Pmjebe Bone Conduction Swimming — biggest trade-off: Open-ear bone conduction means no noise isolation at all, and it has no charging case, just 10 hours per charge.
• ZKBSIAXD Earbuds — biggest strength: 60 hours of total playtime (8 hours per charge plus 52 from the case) with an LED percentage display.
• ZKBSIAXD Earbuds — biggest trade-off: IPX4 only — sweat and light rain, not swimming or submersion.
• Pick Pmjebe if swimming, open-water safety and phone-free listening matter most to you.
• Pick ZKBSIAXD if you want long battery life, a compact case and a secure in-ear fit for everyday workouts.
The Pmjebe set is built around one idea: keep your ears open and keep the water out. Instead of pushing sound into your ear canal, it uses a bone conduction driver that sends vibration through your cheekbone. That means nothing plugs your ears, so traffic, conversations and the poolside around you stay audible. For outdoor runners and cyclists, that awareness is the whole point, and it's also why the ears stay dry and cool even during long, sweaty sessions.
The spec that separates it from almost everything else in this comparison is the waterproofing. The manufacturer rates it IP68 and IPX8, and states it can be submerged in water up to 5 meters deep for up to 24 hours. That's a genuinely swim-capable rating — the kind you look for when you want headphones for laps, not just for a rainy jog. Pair that with the built-in 8GB MP3 player (the brand claims room for up to 3000 songs, supporting M4A, MP3, WAV, WMA, AAC and FLAC) and you get a device that keeps playing when your phone is in a locker. Bluetooth 5.4 is there too, so you can switch to wireless mode out of the water.
Who should buy it: swimmers, triathletes, open-water and pool lap swimmers, and anyone who wants music without a phone. The 10-hour battery covers most training blocks, and the soft silicone open-ear frame is designed to stay put through hard sessions. Who should skip it: if you want bass you can feel, deep isolation on a noisy train, or a charging case to top up between uses, this isn't the design for you. Noise control is listed as none, and bone conduction sound leaks a little by nature. Also note the blue plastic finish is the only color listed.
The ZKBSIAXD earbuds take the opposite approach: seal the ear, then make the battery last. They're true in-ear earbuds with dynamic drivers and three sizes of silicone tips (S/M/L), so you can find a fit that stays locked during lifting, running or cycling. Because they sit in the ear canal, they naturally block more of the room around you — which is great for focus and less great if you need to hear a car coming.
Battery is the headline. The brand lists 8 hours of continuous playback per charge and 52 more hours from the charging case, for 60 hours total, and the case has an LED digital screen showing the exact battery percentage of both the buds and the case. That's a real quality-of-life feature: no guessing whether you have one more workout left. Charging is over USB-C. Bluetooth 5.4 handles the connection, with one-step pairing when you open the case, and touch controls cover play/pause, volume, calls and your voice assistant. They're listed as compatible with any iOS or Android device that supports Bluetooth.
Water resistance is where you need to be honest with yourself. These are rated IPX4 — sweatproof and fine in light rain, nothing more. They are not for swimming and shouldn't be submerged. So: buy them for the gym, running, commuting and desk work, where the in-ear seal and 60-hour total battery genuinely shine. Skip them if your main use is laps in a pool.
Side-by-Side: Which Should You Choose?
• Best for swimming → Pmjebe Bone Conduction Swimming. IP68/IPX8 with submersion rated to 5 meters for up to 24 hours; ZKBSIAXD is IPX4 only.
• Best for phone-free listening → Pmjebe Bone Conduction Swimming. The 8GB built-in MP3 player plays up to 3000 songs without any device.
• Best for situational awareness → Pmjebe Bone Conduction Swimming. Open-ear bone conduction leaves your ear canal completely open.
• Best for blocking out a noisy gym or commute → ZKBSIAXD Earbuds. The sealed in-ear fit with S/M/L tips isolates far more than an open-ear design.
• Best for knowing your exact battery level → ZKBSIAXD Earbuds. The LED screen shows a real percentage, not a vague indicator.
• Best for a compact everyday carry → ZKBSIAXD Earbuds. They live in a charging case; the Pmjebe is a single headset with no case listed.
• Best for calls and touch convenience → ZKBSIAXD Earbuds. Touch controls plus a noise-cancelling mic for voice; Pmjebe uses push buttons and lists no mic or noise control.
• Best for long outdoor sessions in heat and sweat → Pmjebe Bone Conduction Swimming. Ears stay cool and open, and the rating covers heavy sweat and rain.
If I had to pick one, I'd buy the Pmjebe Bone Conduction Swimming — but only because the swimming brief is the harder one to solve and it's the only one of the two that can actually do it. IP68/IPX8 waterproofing, an 8GB offline music library and an open-ear design that keeps you aware outdoors is a combination the ZKBSIAXD simply can't match for water use.
That said, if you never swim, the ZKBSIAXD Earbuds are the more practical daily driver: 60 hours of total playtime, a percentage readout on the case, a secure in-ear seal and touch controls. In my opinion, the deciding question isn't which is "better" — it's whether you get in the water. If yes, Pmjebe. If no, ZKBSIAXD. Either way, check the current price on Amazon before you commit, since that's the one thing that can tip a close call.
FAQ
can i wear waterproof headphones in the shower
are headphones waterproof
Not automatically. "Waterproof" is a rating, not a category. IPX4 means splash and sweat resistance, which is what the ZKBSIAXD Earbuds carry. IP68/IPX8, as on the Pmjebe, means the product is designed to survive full submersion. Always match the rating to your activity rather than the marketing wording.
Bone conduction itself transmits sound through vibration rather than air, so it doesn't need a sealed ear canal — which is exactly why the Pmjebe design suits swimming. The brand rates it IP68/IPX8 for submersion to 5 meters for up to 24 hours, and the onboard 8GB MP3 player means you don't need Bluetooth range to the poolside.
The ZKBSIAXD wins on total runtime: 8 hours per charge plus 52 hours from the charging case, for 60 hours combined, with an LED display showing exact percentages. The Pmjebe is listed at 10 hours of music per charge with no charging case, so it's better for a single long session than for days away from a charger.
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See also: Generic Bone Conduction Headphones vs Opinta Swimming Headphones, Rumatas Swimming Bone Conduction vs AOTONOK Open Ear Headphones, Qyzue Bone Conduction Headphones vs Rinsmola Earbuds