Logitech H370 USB Computer Headset

Input Impedance: 32 Ohms

Sensitivity (headphone): 111 dBSPL +/- 3 dB

Sensitivity (microphone): -42 dBV/Pa +/- 3 dB

Frequency response (Headset): 100 Hz – 10 KHz

Frequency response (Microphone): 200 Hz – 6 KHz