View larger Dual Channel IR Transmitter Through the menu selection, the HIR7UBL has the ability send out two different signals for your headphones to pick up, channel A and channel B, as long as your headphones also have the dual channel capability. For example, one headphone can pick up channel A and you are able to listen to your HIR7UBL. If you have another video unit, you can just flip the switch on your second set of headphones to channel B and listen to that one. Both headphones can be switched between channels A and B to listen to either video source by a simple flip of a switch on your wireless headphones. View larger LED Backlit LED stands for a light-emitting diode. LEDs present many advantages over incandescent light sources, including lower energy consumption, longer lifetime, improved physical robustness, smaller size, and faster switching. All of this translates to a deeper, richer picture quality from your monitor. View larger Pre-Installed Monitor The HIR7UBL headrest includes a 7-inch video monitor already installed right in the “pillow” section. The screen resolution is 800 x 480 pixels and the display is a widescreen TFT. What Comes In The Box? 1. Remote Control 2. Instruction Manual 3. Wire Harness