Plantronics Blackwire C520-M Binaural USB Headset Category_Best4Headsets/3M Peltor Headsets/3M Peltor X-Series Ear Defenders 4 Levels of Active Noise

4 Levels of Active Noise Cancellation

Powerful music with custom 28mm speakers

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

Level-Dependent function for ambient listening

volume for external input and input mode

Plantronics Blackwire C520-M Binaural USB Headset Category_Best4Headsets/3M Peltor Headsets/3M Peltor X-Series Ear Defenders 4 Levels of Active NoiseOptimised 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