Driver : 40 mmImpedance : 18 + 15%Sensitivity : 108+3dbFrequency response : 20 HZ - 20khzMicrophone : 6.0 * 5.0mmMic Sensitivity : 38+3dBMicrophone impedance : 2.2KDirectionality : omni-directionalCable length : 2.1MLED working voltage : DC5VWorking current : = 500mHeadset jack : USB+3.5mm 4 pin