1. Function: answer calls, voice control, play/pause, power bank
2. Bluetooth version: V4.1
3. The headset has a built-in 40mAh 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: 250mAh lithium polymer battery
6. The charging time of the charging box is about 1.5 hours, after use, put it back into the charging box to charge, and the standby time can reach 250 hours