LTB Q-BEAN-UB Wireless Headphone Link USB PnP (Black) w/ built-in Microphone USB Black Wireless Headphone Link with Microphone True Digital Non Compressed Audio 2.4GHz Transmitter for PC and Mac/ Absolutely Noise Free Digital Wireless Range Up to 30 Meters 1.13 Lbs (WxLxH) 1.74" x 3.0" x 0.98"