"Product Specification:

Model:M90 pro
Bluetooth specification:V5.2
Bluetooth Profile:A2DP,AVRCP, HFP, HSP
Working voltage:3.1V~4.2V
Charging voltage:5V-1A
Battery capacity of the headset: 40MAH
Battery capacity of the storage box:1200MAH
Transmission distance:>10M
Call time:About 4-5 hours
Play time:About 4-5 hours
Waterprof :IPX5
Charging time of headset:1h
Charging time of the Charging box:2h
Support system:All Bluetooth dev"