Absolute AWH21 Infrared Wireless Stereo Headphone with IR Wirelees Transmitter Absolute AWH21 Infrared Wireless Stereo Headphone with IR Wirelees Transmitter Infrared Wireless Stereo Headphone with IR wirelees Transmiter for Car audio System Dual Channel for Two Audio Source Compatible with all Vehicle AV Applications Auto Mute and auto Power off functions avaliable for headphones