The Yealink UH34-M-UC is a Professional Mono-Earpiece USB Wired Headset with Crystal Clear Audio. The UH34 Mono offers a lightweight form factor that is comfortable to wear, even for an entire workday. It’s suitable for workers who spend a lot of time wearing headsets for voice communications. The UH34 has soft leather earpieces. Works with: Computer How does it connect: via USB CONDITION Brand New - A brand-new, unused, unopened, undamaged item in its original packaging. WARRANTY This item comes with 24-month manufacturer's warranty. FEATURES • Soft leather earpieces • USB Plug-and-play • HD Voice/Wideband speaker performance • Noise-canceling microphone and passive noise cancellation • ActiveProtection technology safeguards users from acoustic injury • Integrated LED indicator and warning tone • 330° bendable boom arm for easy adjustment without breaking • Perfect match with Yealink IP phones that gives you optimised audio quality QUICK SPECIFICATIONS • Product Type: Wired Headset • Headset cable length:1.2 m (from headset to call control unit) • USB cable length:0.9 m (from call control unit to USB plug) • Supported operating systems:Microsoft Windows® 7/8/8.1/10, Apple Mac OS • Color:Black • Weight:UH34 Mono: 82.5 g / UH34 Dual: 118 g • Storage temperature:-30 °C to +70 °C • Operating temperature:-10 °C to +50 °C • Microphone type:Uni-Directional ECM • Microphone frequency response range:100 Hz-8 kHz • Microphone bandwidth:Wideband • Microphone sensitivity:-44.0 dB re. 1 V/Pa • Speaker size:28mm • Speaker sensitivity:93 dB SPL @1 kHz • Speaker frequency response range:20 Hz-20 kHz • Speaker impedance:32?, @1.0 kHz • Speaker input power:max 10 mW • Speaker bandwidth:Wideband • USB connectivity to Yealink IP phones including: 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) WHAT'S INCLUDED • Yealink UH34 USB Wired Headset • Leather Ear Cushions • Quick Start Guide