Receives wireless video from our 900 MHz cameras/transmitters. Sleek design, 2 channel, RCA wire connects unit to any monitor, TV or VCR. Built-in switcher automatically changes channels. Car mount or Yagi antenna increases range. Also available in optional modified version(highly recommended) which is modified internally & pre-tuned to increase range. Much better for color cameras. 12 to 15 Volt DC.