Logitech H820e Monaural Head-band Black headset

Logitech H820e. Purpose: Call center/Office. Headset type: Monaural, Wearing style: Head-band, Colour of product: Black. Connectivity technology: Wireless, Wireless range: 100 m. Ear coupling: Supraaural, Headphone frequency: 150 – 7000 Hz, Headphone sensitivity: 103 dB. Microphone frequency: 100 – 7000 Hz, Microphone sensitivity: 45 dB