Infrared Wireless Monaural Headphone System (330-1141) Features Faxback Doc. # 16846 The Radio Shack Infrared Wireless Monaural Headphone System uses an infrared light transmitter to send signals from an audio source (such as a TV or radio) to special headphones equipped with a built-in receiver. This frees you from the tangle of headphone wire running between your audio source and the headphones. You can use the system in your home or office, up to 20 feet from the audio source, and you can individually set the sound level on each earpiece. The system includes a transmitter, a mono headphone receiver two phono plug adapters (one 1/8-inch and one 1/4-inch), and an AC adapter. (LB/all-09/14/95)