Description: 1.Model:M19 2.Bluetooth specification:V5.1 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: 50MAH 7.Battery capacity of the storage box:2000MAH 8.Transmission distance:>10M Specifications: 1.100% brand and new 2.Wireless bluetooth earphone 3.LED digital power display 4.Intelligente touch control without compression (playback/pause, answer/hang up, switch songs, adjust volumesummon voice assistant) 5.Bluetooth 5.1 6.Hifi sound quality 7.Can be used as ,power bank,flashlight 8.HD voice assistant 9.Light weight 10.Intelligent noise reduction 11.Comfortable and painless to ear, light weight, no pressure, no harm to the hearing ability 12.Waterproof and sweatproof, strong endurance Package Included: 1 pair of earphone 1*charging cable 1*Manual