• Model: M20 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
• Playtime: About 4-5 hours
• Waterproof : IPX5
• Charging time of headset:1h
• Charging time of the Charging box:2h
• Support system: All Bluetooth devices and mobile phones
• Good Quality