Bluetooth Version: 5.0 Bluetooth Distance: 10m Support Bluetooth Profiles: HSP, HFP, A2DP, AVRCP Driver Diameter: 40mm Impedance: 32 Ω Frequency Response: 20HZ-20000HZ Built-in Battery: 500 mAh Power Supply: Li-polymer battery/ DC 5V Charging Time: 2-3H (support Fast charging 0.8-1H) Working Time: 16H(ANC+BT) Working Time: 23H(BT)