DESC: Control any video or audio product (VCR, satellite receiver, DVD, etc.) from any location in the house. Regardless of where the product is located, the user simply aims an infrared remote control at the target and presses a button. The infrared codes emitted from the remote control are transmitted through the homes coaxial cable and instantly repeated by each infrared repeater/emitter connected to the system. Infrared codes sent via the coax are far more reliable and free of interference than infrared transmitted through the air. There is no need for any additional wires! In order to use the 2100 series 12-volt and 5 volt components, it is necessary that a DA-550 (12volt) or DA-8200 (5volt) series coaxial cable panel be used in the system. It provides power to all of the system IR components and ensures that the signals are passed from targets to emitters