Bluetooth version :Bluetooth V5.0 Supported Profiles :A2DP, AVRCP, HFP, HSP Effective distance :10m Playback time :Approx. 8 hours Charging time :Approx. 1.5 hours Input :DC5.0V 60mA earbuds, DC5.0V, 500mA charging case Impedance: 16Ω