LOGITECH USB HEADSET 340
Microphone Type: Bi-directional
Input Impedance: 22 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
USB connection to PC