H390 USB Computer Headset Microphone Features enhanced digital sound and convenient in-line controls Specifications and Details Height: approx. 171 mm Width: approx. 151 mm Depth: 68 mm Weight: approx. 0.197kg Cable length: 1.9 meters Technical specifications Microphone type: Bi-directional Input impedance: 32 Ohm Sensitivity (Headphone): 94 dBV/Pa +/- 3 dB Sensitivity (microphone): -17 dBV/Pa +/- 4 dB Frequency Response (Headphone Mic): 20 Hz - 20 kHz Frequency Response (Microphone): 100 Hz - 10 KHz Compatibility Windows®, macOS or ChromeOS and all major calling platforms. USB Port 1Type A Port or Adapter Product List USB Computer Headset Microphone User documentation