Logitech H390 Wired Headset w/ Noise-Cancelling Microphone USB In-Line Controls PC/Mac/Laptop

Microphone Type: Bi-directional Input Impedance: 32 Ohm Sensitivity (headphone): 94 dBV/Pa /- 3 dB Sensitivity (microphone): -17 dBV/Pa /- 4 dB Frequency response (Headset): 20 Hz – 20 KHz Frequency response (Microphone): 100 Hz – 10 KHz