Our video transmitter system transmits video and audio up to 300 feet on the uncrowned, ultra-efficient 5.8 GHz frequency band. With four user-selectable channels and generous 20 MHz separation, up to 4 of these units can be deployed simultaneously in any given area. This wireless video link has an added bonus of an IR relay which gives you the ability to remotely control DVRs, digital cable/satellite receivers or any other IR remote controlled unit. Both the wireless transmitter and wireless receiver measure 6 inches front to rear, 1.6" in height and 4.2 in width. Comes with instructions, transmitter, receiver, antennas and a 3 year warranty.