uinb-2205 Bluetooth headset Bluetooth Version : 5.0 Talking Time : Up To 12 Hours Music Time : Up To 10 Hours Standby Time : 50 Hours Charging Time : 1-2 Hours Charging Type : Micro USB Charging Power : DC5V 135 mAh Transmission Distance : 32ft. (10m) Output Power : 3mW x 2 Sensitivity : 102dB at 1KHz Impendance : 16 Ohm Frequency Range : 20Hz - 20KHz THD : <1% Supported Profiles : HSP, HFP, A2DP, AVRCP Mic Sensitivity : -42dB Mic Impendance : 2200 Ohm