Bluetooth version : Bluetooth V5.0 Bluetooth profiles : HSP, HFP, A2DP, AVRCP Effective distance : 10m Playback time : Approx. 12 hours(earbuds + docking case) Charging time : Approx. 1.5 hours Input : DC5.0V 60mA(earbuds) DC5.0V 500mA(docking case) Frequency response : 20Hz-20KHz Sensitivity : 94dB Impedance : 32Ωcase