Technical Specifications: - Microphone Type: Bi-directional - Input Impedance: 20 Ohms - Sensitivity (headphone): 115 dB +/-3 dB - Sensitivity (microphone): -42 dBV/Pa +/- 3 dB - Frequency response (Headset): 20 Hz - 20 kHz - Frequency response (Microphone): 100 Hz - 16 KHz