Product Specification:1.Model:F92.Bluetooth specification:V5.03.Bluetooth Profile:A2DP,AVRCP, HFP;HSP4.Working voltage:3.1V~4.2V5.Charging voltage:5V-1A6.capacity of the headset: 50MAH7.capacity of the storage box:2000MAH8.Transmission distance:>10M9.Call time:4-5h10.Play time:4-5h11.Waterprof :IPX712.Charging time of headset:30-45min13.Charging time of the Charging box:1hProduct Details:1*F9-10 TWS Bluetooth Earbuds