Input Impedance: 22 Ohms Sensitivity (headphone): 122 dB +/-3 dB Sensitivity (microphone): -44 dBV/Pa +/- 2.5 dB Frequency response (Headset): 20 Hz to 20 kHz Frequency response (Microphone): 100 Hz to 6.5 kHz Cable length: 1.8 m