Plantronics Blackwire 210 single earpiece headset makes PC voice communications more effective and productive. Delivering full wideband audio, Hi-Fi stereo and USB-enhanced digital sound, the corded Blackwire 200 series was designed to economicallyprovide the best PC voice and audio available for large, enterprise-wide deployments. Users appreciate the flexible headband that adjusts to a perfect fit andsoft, swiveling ear cushions that provideall day comfort during conference calls or whilelistening to audio.Choose between the sound reduction binaural design or the monaural headset design offering all day comfort Wideband audio and Hi-Fi stereo Noise-cancelling microphone SoundGuard technology Digital Signal Processing (DSP) Features call answer/end, mute and volume Swivelling QuickAdjust microphone boom Ideal for mobile professionals who use their PC for UC and multimedia applications For professionals who use PC telecommunications and multimedia several hours a day from multiple locations Durable, portable design