Bluetooth Version: New Bluetooth 5.0 headphone Battery Capacity: 60mah charging Battery Capacity: 3500mah music Playback Time: 300 Hours call Voice Time: 320 Hours charging Time: 1-2 Hours supporting Protocols: A2dp; Avrcp, Hfp, Hsp frequency Range: 2.402ghz~2.480ghz Ism Band signal Distance: 10 Meters BarrieR-Free support Device: Device With Bluetooth headphone Charging: Put Into The Charging Compartment To Automatically Charge, Automatic Power Off When The Electricity Is Full. color: Black,