Bone conduction Bluetooth earphones M520 deliver extended talk time and open-ear listening using a 150mAh battery and Bluetooth 5.2 connectivity for stable audio and hands-free calls.
These black bone conduction earphones use an 8mm speaker with 32Ω impedance and a biological diaphragm designed to reproduce transparent mids and flexible lows while leaving the ear canal open. IPX5 water resistance protects against rain and sweat for outdoor use. TWS pairing allows two earphones of any color to form binaural mode; built‑in microphone has -42dB sensitivity and supports caller ID and voice assistant calls.
Specifications
- Bluetooth version: 5.2 + EDR
- Wireless frequency: 2.4GHz
- Supported protocols: A2DP 1.3 / HFP 1.6 / HSP 1.2 / AVRCP 1.6 / D11.3
- Battery capacity: 150mAh; charging voltage/current: 5V/1A; charging time: about 2 hours
- Talk time: about 48 hours; Listening time: about 26 hours
- Power: 5W
- Speaker/impedance: 8mm / 32 ohm; microphone sensitivity: -42dB
- Water resistance: IPX5
- Weight: about 36 grams
Size Guide
- Overall dimensions: about 7.7 x 4 x 0.9 cm
- Lightweight design at ~36 g for extended wear without ear canal insertion
Package Contents & Compatibility
- Includes: earphone x1, charging cable x1, manual x1
- Features: Chinese/English language switch, low battery display, TWS binaural pairing
These M520 bone conduction earphones are intended for hands‑free calling and open-ear music listening during active or outdoor use.
