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We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-09-24 · 6 min read · Independent comparison
• mojawa Aerra IP67 — biggest strength: A fully sealed IP67 body plus 8 hours of music and calls, magnetic fast charging, and dual-device Bluetooth 5.2 pairing. It's the sport-first pick.
• mojawa Aerra IP67 — biggest trade-off: Battery life is roughly half of the FANSAISI, and the touch controls mean no physical buttons for volume or track changes.
• FANSAISI Bone Conduction Hearing — biggest strength: Around 15 hours from a 250mAh battery, a 29g build, and a smart dual-mode design that auto-switches between sound pickup and Bluetooth.
• FANSAISI Bone Conduction Hearing — biggest trade-off: IPX5 only handles rain and sweat, not full submersion, and in Bluetooth mode you adjust volume and tracks from your phone rather than the headset.
• Who each is for: Pick the mojawa Aerra IP67 if you train hard outdoors and want water resistance and richer audio; pick the FANSAISI if you want maximum runtime and a headset tuned for picking up voices around you.
The Aerra is built like a piece of sports gear first and a headphone second. Its headline spec is IP67 — an integrated, fully sealed body that shrugs off heavy sweating and getting caught in the rain. For anyone who runs, cycles, or trains outdoors in unpredictable weather, that rating is the whole point. You're not babying these; you're wearing them through the workout and rinsing them off afterward.
The audio side is more ambitious than most open-ear designs. mojawa says Grammy-winning producers were involved in calibration, and the Mojawa Audio-Haptics Integrated System is designed to strengthen low-frequency rhythms — the part bone conduction usually struggles with. There are also three selectable sound modes (Equalizer, Bass Boost, and Vocal Enhancement), so you can tilt the tuning toward thump for a run or toward voices for a call. Add Bluetooth 5.2, dual-device connection so you can stay paired to a phone and a laptop at once, and dual silicone microphones with ENC noise cancellation for calls, and it's a genuinely multitasking headset.
Who should buy it: outdoor athletes, commuters who want to hear traffic, and anyone who wants one headphone for both training and calls. Who should skip it: if you need all-day battery without recharging, or you dislike touch controls, the FANSAISI is the better fit.
FANSAISI Bone Conduction Hearing: Who It's For
The FANSAISI approaches the same open-ear idea from a different angle: it's less about performance audio and more about staying connected to the world and to conversation. It runs a dual-mode system. By default it sits in sound pickup mode, using its built-in HD microphone and sound collector to amplify voices around you for daily conversations. The moment it detects sound or activity from your phone, it auto-switches to Bluetooth mode — and if there's no sound or operation for about 3–5 seconds, it flips back to pickup mode. That automatic handoff is the defining feature, and for someone who wants to hear the room and their music without fiddling with settings, it's genuinely convenient.
Endurance is the other strength. A 250mAh battery delivers around 15 hours of use at roughly 80% volume, and a full charge takes about two hours. At 29g, it's light enough to wear all day, and the packaging includes a silicone rope so you can adjust the neckband if the fit isn't quite right. Bluetooth 5.3 gives it the newer wireless standard of the two, with a stated range of about 33 feet. Noise cancellation is listed as active, aimed at reducing background noise and lifting human voices.
The trade-offs are clear. Water resistance is IPX5 — fine for rain and sweat, but not for full immersion, so don't treat it like the IP67 mojawa. In Bluetooth mode, volume, track skipping, and play/pause are handled on your phone, not the headset; only the + button answers and ends calls. The controls are physical buttons rather than touch, which many people actually prefer. It also ships with a Chinese voice prompt that you switch to English using a button combination, and the warranty is listed as one year.
Who should buy it: people who want long runtime, a featherweight fit, and a headset that helps them follow conversations while still streaming audio. Who should skip it: swimmers, heavy sweaters, or anyone who wants on-device playback controls.
• Best for water and sweat resistance → mojawa Aerra IP67. IP67 versus IPX5 is the single biggest durability gap between them.
• Best for battery life → FANSAISI Bone Conduction Hearing. Around 15 hours against 8 hours is nearly double the runtime.
• Best for fast charging → mojawa Aerra IP67. A 5-minute charge adds about 1.5 hours of playtime; the FANSAISI needs about 2 hours for a full charge.
• Best for sound tuning options → mojawa Aerra IP67. Three selectable modes plus the Audio-Haptics low-frequency system give you more control over how it sounds.
• Best for conversation pickup → FANSAISI Bone Conduction Hearing. The sound collector and auto-switching pickup mode are purpose-built for hearing people around you.
• Best for the lightest all-day wear → FANSAISI Bone Conduction Hearing. At 29g, it's designed to disappear on your head.
• Best for pairing with two devices at once → mojawa Aerra IP67. Dual-device connection lets you juggle a phone and a laptop without re-pairing.
• Best for on-device controls → FANSAISI Bone Conduction Hearing. Physical buttons for volume and calls beat touch gestures when your hands are busy.
In my opinion, the mojawa Aerra IP67 is the one I'd buy for anyone who trains outdoors. The IP67 sealed body, the fast-charge top-up, dual-device pairing, and the three sound modes make it the more versatile headphone for active use. The FANSAISI is the smarter pick if battery life and conversation pickup are your priorities — 15 hours and a 29g build are hard to argue with for all-day wear. But for the run-commute-call mix most people actually live, I'd take the Aerra. Check the current price on Amazon before you decide, since it's the one variable I can't compare here.
FAQ
The FANSAISI. It runs around 15 hours on a 250mAh battery, while the mojawa Aerra is rated at 8 hours. The Aerra counters with magnetic fast charging that adds about 1.5 hours from a 5-minute top-up.
On the mojawa Aerra, yes — it uses touch controls. On the FANSAISI, only the + button handles calls; in Bluetooth mode you adjust volume and tracks from your phone, though the + and – buttons work for volume in sound pickup mode.
The FANSAISI at 29g, and it includes a silicone rope to fine-tune the neckband fit. The mojawa Aerra uses silicone and TPE materials with a secure open-ear fit, but its weight isn't specified in the specs.
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See also: Soundbot Behind vs Rhyfell Bone Conduction Headphones, Rakklor Bone Conduction Headphones vs Wentronic Kids Headphones, XPAU Bone Conduction Headphones vs KTGEE Earbuds