1. Function: answer calls, voice control, play/pause
2. Bluetooth version: V4.1
3. The headset has a built-in 55mAh lithium polymer battery
4. Earphone charging time is about 1 hour / standby is about 50 hours / continuous use is about 3-4 hours
5. Charging case: 1200mAh lithium polymer battery
6. The charging time of the charging box is about 2 hours, after use, put it back into the charging box to charge, the standby time can reach 400 hours