Plantronics C210 Blackwire UC Standard Headset With simple call controls for a convenient hands-free experience, the corded Plantronics Blackwire C210 makes PC voice communications more effective and productive. Delivering full wideband audio, Hi-Fi stereo and USB-enhanced digital sound, the Blackwire C210 Series was designed to economically provide the best PC audio available for large, enterprise-wide deployments