Logitech H340 USB Headset

– 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