Yealink YHS36. Product type: Headset, Wearing style: Head-band, Recommended usage: Office/Call center. Connectivity technology: Wired. Ear coupling: Supraaural, Maximum input power: 5 mW, Headphone frequency: 20 - 20000 Hz. Microphone type: Boom, Microphone frequency: 100 - 7000 Hz, Microphone sensitivity: -44 dB. Weight: 170 g