1. Bluetooth: 3.0v +EDR.
2. Support bluetooth protocol: HSP, HFP, A2DP, AVRCP, AGHSP.
3. Working time: 15 hours.
4. Standby time: 350 hours.
5. Charging time: 3 hours.
6. Battery: contains rechargeable lithium battery 3.7v, 800mAh.
Waterproof level: IP67
The maximum distance of the four is 2100 meters