Noise cancelling Microphone Microphone sensitivity: 40±3dB(0dB=1V/Pa,at1KHz) Headphone Impedance: 150 ohms Headphone frequency range: 100-6600HZ Headphone sensitivity: 100±3dB Environmental noise: ≤ 60dB(A) Lightweight and comfortable to wear Adjustable headphone and microphone volume Operating systems compatibility: Windows/MAC/Linux Software compatibility: Skype, Zoom, Microsoft Teams and other video conferencing software