Business Wireless Earphone Hey Series,Uibt2646 U&I

Bluetooth Version : V4.1+EDR talking Time : Up To 10 Hours Playing Time : Up To 3-4 Hours Standby Time : Over 120 Hours Charging Time : 1-2 Hours Charging Power : DC5V 110 mAh   Input Power :DC5V Sensitivity : 102dB at 1KHz Impendance : 32 Ohm Frequency Range : 2.4026GHz-2.480GHz Supported Profiles : A2DP1.3/HFP1.6/hsp1.2/AVRCP1.6/D11.3 Mic Sensitivity : -42Db Mic Impendance : 2200 Ohm Battery :3.7/60mAh rechargeble Libattery Working temperature:-10-55 C° Wireless distance :33 feet or 10 meters in clear space