Yealink UH36-M Mono USB Business Headset - Speaker sensitivity: 93 dB SPL @ 1 kHz, 60 mV - Speaker Frequency response range: 20Hz-20kHz - Speaker impedance: 32+/-4.8O, @ 1.0 kHz - Input power: normal 5 mW, max 10 mW - Bandwidth: Wideband - USB to Yealink IP Phones incl: T41S/T42S/T46S/T48S/T42U/T43U/T46U/T48U/T53/T53W/T54W/T57W/T58A/VP59 (T41S/T42S/T46S/T48S should be upgraded to version 82 or higher) - USB & 3.5 mm connectivity - UH36-M - 12 Months Limited Warranty

Manufacturer Warranty: 12 Months Limited Warranty

Manufacturer Contact Info: http://www.yealink.com/,

Yealink UH36-M is a USB wired mono headset especially designed for Unified Communication, office, and call center professionals, featuring high-quality audio, exceptional wearing comfort, proven integration of Yealink IP phone and device management platform, ensures your every conversation a great experience.

The Yealink UH36-M, is a professional USB wired headset to facilitate the conversations in ways that your concentration zone and focus is easily got in and the listening fatigue is reduced as well. Provided with Yealink USB Connect software and Yealink Device Management Platform/Cloud Service, you are easy to check the device information and upgrade the firmware of one or multiple UH36 headsets.