BLACKWIRE C725M Headset - The Blackwire 725 USB headset is great for keeping you focused in noisy office environments. Featuring Active Noise Canceling technology, a noise-canceling mic, and hi-fi stereo performance, the Blackwire 725 minimizes external noises while ensuring that PC-based calls and multimedia come through crystal clear. With the Blackwire 725, distractions go down and productivity goes up. Plantronics