1.Model:air39
2.Bluetooth specification:V5.3
3.Bluetooth Profile:A2DP,AVRCP, HFP;HSP
4.Working voltage:3.1V~4.2V
5.Charging voltage:5V-1A
6.Battery capacity of the headset:40MAH
7.Battery capacity of the storage box:800MAH
8.Transmission distance:>10M