Unisar TV Listener J3 Infrared Wireless Headphones use an infrared receiver to connect to a stereo, TV or other device, giving you freedom to move around while you listen. They have an operable range of up to 33 feet. The headphones themselves are lightweight and have soft ear cups, making them comfortable to wear, and can operate up to 15 hours on fully charged batteries. The receiver is able to register more than one pair of TV wireless headphones so that multiple people can listen to the same audio source at the same time. Volume control lets you keep sound at a manageable and enjoyable level.