Designed for use in mass-deployment enterprise environments, the Blackwire C3220 UC Stereo USB-A Headset from Poly is a noise-canceling headset that features a flexible boom microphone and a USB-A interface for connecting to most Macs and Windows PCs. The stereo design boasts leatherette-encased, on-ear speakers featuring hearing protection to guard against sounds above 118 dBA. Additionally, the Blackwire C3220 Headset comes equipped with inline controls that let you answer, ignore, end, hold, redial, and mute calls as well as adjust the volume. The inline controls can also be used to control music and other multimedia applications.