Andrea NC185VM Noise Canceling Stereo Headset with Volume Control - This headset features in-line digital volume and mute controls, Andrea noise cancellation microphone technology with highest voice recognition industry rating, and a Pro-Flex wire microphone boom for accurate microphone placement. http://www.startechtel.com/business-phone-headsets/business-headsets/corded/andrea-nc185vm-noise-canceling-with-volume-control.html#.VvBuzubCbrY #Andrea #Headsets #Startechtel