We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-10-02 · 7 min read · Independent comparison
If you want a straightforward, comfortable pair of bone conduction headphones for running, cycling and gym sessions, choose MASTJUST Bone Conduction Headphones; if you need a multi-tool device that also shoots video, records audio and translates languages on the fly, choose sucegi E12.
• MASTJUST Bone Conduction Headphones — biggest strength: a simple, focused open-ear sports headset with an IP65 rating, up to 8 hours of playback, a flexible titanium headband and Bluetooth 5.0. It does one job and does it without extra baggage.
• MASTJUST Bone Conduction Headphones — biggest trade-off: it is not made for swimming, it does not support fast charging (the brand explicitly warns against fast-charging adapters), and there is no camera, no translation and no voice-assistant layer.
• sucegi E12 — biggest strength: a true 3-in-1 device combining a camera, voice recorder and bone conduction headphones, plus a dual AI system that supports real-time translation, auto meeting notes and object recognition.
• sucegi E12 — biggest trade-off: it is bulkier as a pure music headset, relies on touch and voice controls that take getting used to, and its feature set is overkill if all you want is audio for a jog.
• Who each is for: MASTJUST Bone Conduction Headphones for runners, cyclists and gym-goers who want uncomplicated open-ear audio; sucegi E12 for vloggers, travellers, meeting-heavy professionals and language learners who want to carry one gadget instead of three.
This is the kind of bone conduction earphone that earns its place through restraint. The MASTJUST headset transmits sound by vibrating the temporal bones rather than pushing audio into your ear canal, which means your ears stay open and you keep hearing traffic, footsteps and conversation around you. The hook-style earpiece sits over the ear rather than in it, so there is no pressure build-up after an hour of wear — a real consideration if you have ever given up on in-ear buds mid-run.
The specs back up the sports-first pitch. The IP65 rating covers sweat, dust and light rain, so a sweaty gym session or a drizzle-soaked bike commute is fine. The battery is quoted at up to 8 hours of playback with 480 hours of standby, and a full charge takes roughly 1.5 to 2 hours over USB-C. Bluetooth 5.0 gives you a 33-foot wireless range, which is plenty for leaving your phone on a bench while you move around. The whole thing weighs about 25 grams, and the titanium alloy headband is memory-shaped so it bends 360 degrees without deforming — you can shove it in a bag without worrying.
sucegi E12: Who It's For
The sucegi E12 is a different animal entirely. It is still an open-ear bone conduction headset at its core — aviation silicone earhooks, non-blocking ear canals, awareness of your surroundings during workouts — but the headline is the 3-in-1 integration. There is a built-in camera, a voice recorder, and the headset itself, all in one unit. The pitch is simple: stop carrying a camera, a recorder and headphones separately.
Then there is the AI layer. You wake the system with "Hi, Luma," and it supports real-time translation, automatic meeting notes and object recognition, compatible with OpenAI and Tongyi Qianwen. For anyone doing business travel, language learning or back-to-back meetings, that is a genuinely unusual combination in a headset form factor. On the audio side, the E12 uses a 10 mm dynamic driver with a 32-ohm impedance, a 20 Hz frequency response, 105 sensitivity and a quoted 60 ms audio latency. Bluetooth 6.0 is the newer standard here, with the same 33-foot range. Battery life is quoted at 10 hours per charge, with a 10-minute quick charge giving about an hour of playback, and a full charge in roughly 1.5 hours. IP65 protection covers sweat, dust and light rain.
Who should buy it: vloggers shooting on the move, outdoor creators who want hands-free recording, professionals who need meeting documentation and translation, and language learners who want on-the-spot help. Who should skip it: someone who just wants music for a run and does not want to manage touch controls, voice wake words or a camera they will never use. The E12 also uses touch and voice control rather than physical buttons, which some people find less precise when their hands are sweaty or gloved. And there is no active noise cancellation listed — it is an open-ear design, so plan accordingly.
Side-by-Side: Which Should You Choose?
• Best for pure running and cycling audio → MASTJUST Bone Conduction Headphones. Open-ear safety, IP65, lightweight build, physical button controls.
• Best for battery life → sucegi E12. Up to 10 hours versus up to 8 hours, plus a quick-charge option that gives an hour of playback from a 10-minute top-up.
• Best for fast charging flexibility → sucegi E12. MASTJUST explicitly advises against fast-charging adapters, while the E12 lists a quick-charge capability.
• Best for translation and meeting notes → sucegi E12. Real-time translation, auto meeting notes and object recognition, with ChatGPT-compatible AI.
• Best for fuss-free operation → MASTJUST Bone Conduction Headphones. Button controls, no wake words, no app-style AI layer to learn.
• Best for Bluetooth generation → sucegi E12. Bluetooth 6.0 versus Bluetooth 5.0, both with a 33-foot range.
• Best for someone who wants one simple job done well → MASTJUST Bone Conduction Headphones. No camera, no recorder, no translation — just open-ear sports audio.
If I were buying for myself and my priority was a dependable pair of bone conduction earphones for running, cycling or the gym, I would take the MASTJUST Bone Conduction Headphones. It is lighter at roughly 25 grams, it uses straightforward button controls, and it does the open-ear sports job without asking me to learn a voice assistant or manage a camera. I would only switch to the sucegi E12 if I actually needed the camera, recorder and AI translation — in which case the E12 is the more capable device by a wide margin, and the 10-hour battery and quick charge make it easier to live with. Match the tool to the job; that is the whole decision.
how to bone conduction earphones work
Bone conduction earphones transmit sound by vibrating the bones around your ear — in the MASTJUST's case, the temporal bones — rather than pushing sound through your ear canal with a speaker or earbud tip. The vibrations reach the inner ear directly, so your ear canal stays open. That is why both headsets here use an open-ear, hook-style fit instead of in-ear tips.
how to wear bone conduction earphones
You hook the headband over the top of your head and rest the transducers against the bone just in front of your ears, not inside the ear canal. The MASTJUST uses a flexible titanium headband that bends to fit, while the sucegi E12 uses aviation silicone earhooks. Both are designed to sit snugly without pressing into the ear, which is what keeps them comfortable over long sessions.
how to use bone conduction earphones
Charge the headset, pair it over Bluetooth, and control playback with the built-in controls — physical buttons on the MASTJUST, touch and voice controls on the sucegi E12. The E12 adds a voice wake word ("Hi, Luma") for its translation, meeting-note and object-recognition features. For the MASTJUST, use a standard charger rather than a fast-charging adapter, since the brand warns fast charging can stop it charging correctly.
how are bone conduction earphones different for sports
The main advantage is awareness. Because your ear canal is open, you still hear traffic, other runners and your surroundings, which is why both headsets carry an IP65 rating for sweat, dust and light rain. The trade-off is that neither blocks outside noise the way sealed or noise-cancelling headphones do. Neither of these is designed for swimming.
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