Indoor/Outdoor on 12 to 24 volt DC. Includes transmitter and receiver. 200 feet operational range. Receives coded signal - precoded by factory. 5 amp relay operational from 8V through 40V DC. Receiver mounted in waterproof box. Transmitter is FCC and CE approved. Other remotes / receivers available upon request. 301-142, -143, -144 have 5 Amp, all others 15.