Logitech headphones OEM, H570e, mono, USB

The adjustable padded headband, together with soft ear cushions, ensures excellent comfort even after prolonged use.
The noise and echo cancellation system ensures that you can talk without any problems even in noisy environments
Intuitive control pad for managing calls and volume
Dynamic frequency equalizer automatically switches between speech and music for the best sound quality
Logitech Sound Protection technology protects your ears from sounds louder than 115 dBA
Compatible with Windows 7 or later, MacOS 10.7 or later, and Linux
Certified for Skype for Business and compatible with most other programs, such as Zoom, BlueJeans, Google Hangouts Pro, Cisco, etc.
Dimensions: 172 x 165 x 50 mm
Weight: 85 g

Headphones:
Frequency response: 31.5 - 20,000 Hz
Sensitivity: 94 dB ±3 dB at 1 KHz, 0.01 m, 0.01 W
Distortion: < 5% @ 1 kHz, 10 mW, 1 kHz
Compliant with EN60950-1 standard

Microphone:
Type: directional ECM
Frequency response: 100 - 18,000 Hz
Sensitivity: -47 dB +/- 3 dB
Distortion: <2% @ 1 kHz, 94 dB SPL
Operating voltage: 1.4 - 5.0 V DC