Drive unit : moving coil Impedance : 32Sensitivity: 105Frequency : 20 HZMic Diameter : 6.0 Mic Sensitivity : 24Mic Impedance : 2.2Directivity : All DirectivityLED Operation : Voltage : DC5VCable length : 1.9Opreation Current : 200mAHeadset interface : USB +3.5mm 4pin