Andrea Communications NC-250 Circumaural Stereo PC Headset with Noise Canceling Microphone, Volume Control, dual 3.5mm plugs, in Retail Packaging. Stereo Headset with Noise Canceling Microphone and Volume/Mute Controls Includes Andrea's Noise Cancellation Microphone Technology with Highest Voice Recognition Industry Rating Rubber soft-flex microphone boom for accurate microphone placement Windsock for minimal breath popping Not compatible with Macs