The Alarm Controls RT-1 is a package that includes two wireless transmitters and a receiver. The receiver can accept a maximum of 30 transmitters, and it is outfited with an LED status indicator. The receiver also features a built-in five second relay on release and a cover designed to hide screw terminals for a clean installation. One transmitter comes with a keychain. Also known as -ALARM CONTROLS RT-1 2 TRANSMITTERS/1 RECEIVER