1. BT specification: BT V5.0 CSR8635.
2. Support: Headset, Hands-free, A2DP, AVRCP.
3. Charging voltage DC5V, charging time is about 2 hours.
4. Battery capacity: 140mAh.
5. Sizes: 138 * 105 * 45mm. Weight: 34g.
6. Calls / music time 6 hours. Standby time: 120 hours.
7. Waterproof performance: IP65.
8. Bone conduction technology, opened ears, do not affect wearing glasses. 
