- Frequency response: * Headset 20Hz - 20KHz * Mic 100Hz - 10KHz - Sensitivity: Headset 115dB / Mic -34dB - Impedance: * Headset 32ohm * Mic 2.2 kohm * 2VDC - Driver unit: 40 mm - 3.5 mm - Type: Omni-directional microphone - Cable Length: 2 m - Volume Control: Yes - Microphone: Yes - Adjustable headband: Yes