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We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
If you want a swimming-proof bone conduction headphone with a huge offline library and a rock-solid fit under a swim cap, choose mojawa Run Plus Bone; if you need the lightest possible all-day open-ear pair with a flexible titanium frame and modern Bluetooth, choose DEMICEA Open Ear Sport. That is the short version. Below I break down exactly why, spec by spec, so you can stop second-guessing and just pick the one that matches how you actually train.
• mojawa Run Plus Bone — biggest strength: a genuine IP68 build rated for submersion up to 2 meters for 2 hours, plus a 32GB MP3 player that holds roughly 8,000 songs, so you can leave your phone in the locker and still swim with music.
• mojawa Run Plus Bone — biggest trade-off: button controls and a slightly heavier carry setup (0.31 kg shipping weight, plastic build), and the brand itself warns that wet hands can cause touch or button misfires, so you have to dry off before operating it.
• DEMICEA Open Ear Sport — biggest strength: an extremely light 0.99 oz design on a 0.7mm flexible memory titanium-alloy frame with skin-friendly silicone, built to stay comfortable for hours and to sit alongside sunglasses.
• DEMICEA Open Ear Sport — biggest trade-off: the 32GB storage holds over 4,000 songs rather than 8,000, and the charging cycle is slower — 2 hours for a full charge versus mojawa's 50-minute full charge.
• Who each pick is for: mojawa for swimmers and runners who want maximum offline storage and fast top-ups; DEMICEA for all-day wearers, gym-goers and glasses-wearers who prioritize weight and comfort above everything.
The Run Plus is the more specialized tool of the two. Its headline spec is that IP68 rating: it can be submerged 2 meters underwater for 2 hours, which is a real, unusual capability in this category. mojawa even documents the swim workflow — disconnect Bluetooth, switch to MP3 mode, disable the touchpad — which tells you this thing was designed with lap swimming in mind, not just "sweat resistance." The 32GB built-in MP3 player stores up to 8,000 songs or audiobooks, so you can genuinely leave your phone behind.
Battery is the second strong point. You get up to 8 hours of continuous audio at 75% volume, and the quick-charge feature adds 80 minutes of playback from a 5-minute top-up. A full charge takes about 50 minutes. For someone who trains daily and forgets to charge, that five-minute rescue is the difference between a silent workout and a good one. mojawa also claims enhanced bass via a physical bass-strengthening design and a dual suspension anchor system, with a bone conduction driver spanning roughly 20 Hz to 20,000 Hz.
Who should buy it: swimmers, triathletes, rainy-day runners and anyone who wants a large offline library without a phone. The button controls are also a quiet advantage — they work predictably when your hands are cold or gloved. Who should skip it: if you mostly want featherweight all-day comfort, the plastic build and heavier carry weight work against it. And note mojawa's own caveat — wet hands or a wet unit can cause operation to fail, so you must dry off before pressing anything. It also carries a two-year warranty, which is a longer coverage window than the DEMICEA's 18 months.
The DEMICEA wins on a different axis: wearability. At 0.99 oz it is remarkably light, and the construction is the story here — a 0.7mm flexible memory titanium-alloy frame with skin-friendly silicone on the rear bridge, plus soft silicone cushions at the front of the ears. That combination is engineered for continuous optimal shape and balanced weight distribution, so it should stay put without pinching. Crucially, the design is explicitly built not to hinder sunglasses, which matters if you run or cycle in bright light.
Audio is handled by a 16mm bone conduction driver paired with SoundBeam directional sound field technology, which the brand says limits leakage so your audio stays private. There is also an audio power amplifier and ResoRich processing aimed at cleaning up electromagnetic interference and tightening overall sound. Bluetooth 5.3 is the newer standard of the two, with AAC/SBC support and low-latency claims — a small but real edge for video and calls. Battery is rated at up to 8 hours, with a 5-minute quick charge giving about 30 minutes of playback, and a full charge taking 2 hours.
The 32GB storage holds over 4,000 high-quality songs, transferred via the magnetic data-and-charging cable. That is plenty for most people, but it is roughly half of mojawa's capacity. Controls are touch-based, which feels modern but can be fussy with sweaty or gloved fingers.
Who should buy it: gym-goers, walkers, commuters, glasses-wearers and anyone who wears open-ear headphones for hours and hates pressure points. Who should skip it: if your priority is maximum song storage, the fastest charging, or the most proven submersion workflow, the mojawa edges ahead.
• Best for swimming → mojawa Run Plus Bone. Its IP68 rating covers 2 meters for 2 hours, and mojawa publishes a specific swim procedure.
• Best for all-day comfort and light weight → DEMICEA Open Ear Sport. At 0.99 oz with a memory titanium-alloy frame, it is built to disappear on your head.
• Best for offline storage → mojawa Run Plus Bone. 32GB for up to 8,000 songs versus DEMICEA's 4,000-plus.
• Best for fast charging → mojawa Run Plus Bone. About 50 minutes to full and 80 extra minutes from a 5-minute charge, versus 2 hours to full on the DEMICEA.
• Best for glasses-wearers → DEMICEA Open Ear Sport. The frame is explicitly designed to sit alongside sunglasses without conflict.
• Best for newer wireless tech → DEMICEA Open Ear Sport. Bluetooth 5.3 with AAC/SBC support beats mojawa's Bluetooth 5.2.
• Best for cold or gloved hands → mojawa Run Plus Bone. Physical buttons beat touch controls when your fingers are numb.
• Best for longer coverage → mojawa Run Plus Bone. Two-year warranty versus 18 months on the DEMICEA.
In my opinion, I would buy the mojawa Run Plus Bone. The IP68 submersion rating plus the documented swim workflow make it the more capable training partner, and 8,000 songs of offline storage with an 80-minute quick charge is hard to argue with. The DEMICEA is genuinely the more comfortable headphone and I would recommend it without hesitation to anyone who lives in their open-ear pair all day or wears glasses. But if you want one pair that handles pool sessions, rain, long runs and a phone-free library, mojawa is my pick.
FAQ
Both are rated up to 8 hours of playback. The difference is charging: mojawa reaches full in about 50 minutes and adds 80 minutes from a 5-minute top-up, while the DEMICEA takes 2 hours to charge fully and gives about 30 minutes from a 5-minute quick charge.
No. Both have 32GB of built-in storage and an MP3 mode. mojawa holds up to 8,000 songs or audiobooks; DEMICEA holds over 4,000 high-quality songs, loaded through its magnetic data-and-charging cable.
The DEMICEA Open Ear Sport. It weighs just 0.99 oz, uses a 0.7mm flexible memory titanium-alloy frame with silicone cushions, and is specifically designed not to interfere with sunglasses. That said, comfort is personal, so check the current price on Amazon and weigh the trade-offs yourself.
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