Plantronics Blackwire 7225 corded USB headset is the brand's top of the line USB headset designed for open office environments for use by professionals needing a UC headset with hi-fi stereo sound, and all-day comfort. Key features that set the Plantronics Blackwire 7225 USB headset apart from other corded USB headsets is Active Noise Cancelling that drastically lowers noise around you and four boomless microphones with DSP allowing you to deliver natural voice sound without the annoyance of adjusting a mic boom each time to use the headset. Couple all this with Plantronics excellent build quality, customer support and 2-year warranty, the Plantronics Blackwire 7225 USB headset is a great choice for customer support teams, IT professionals, and mobile workers that use laptops for unified communication.