Plantronics Blackwire C520-M Binaural USB Headset Category_Best4Headsets/3M Peltor Headsets/3M Peltor X-Series Ear Defenders Level-Dependent function for ambient listening

Level-Dependent function for ambient listening

Place or receive call without the need for a mechanical lifter

Single-sided wearing style (monaural) – numbered headband grooves for step-by-step adjustment for instant perfect fit

4 Levels of Active Noise Cancellation

Soundguard Digital Protection

Plantronics Blackwire C520-M Binaural USB Headset Category_Best4Headsets/3M Peltor Headsets/3M Peltor X-Series Ear Defenders Level-Dependent function for ambient listeningOptimised for Microsoft Lync Microsoft Office Communicator Binaural USB Headset Hi Fi Stereo Sound Dynamic EQ automatically adjusts audio settings between voice calls and music PC wideband audio noise canceling Noise Cancelling Microphone Digital Signal Processing (DSP) Headset control panel UC presence automatically updated when on a call One touch call controls: answer end volume mute Smart Sensor technology answer a call by putting on the headset