Includes 1 Allstar Receiver and 1 921-318 Transmitter

Works with almost all brands and models

Standard 3 prong connection.

Requires 3 wire connection and 24 volts AC. Transformer not included. Transformer sold separately for machines with 2 wire connections and openers that do not supply 24 volts.

Three position dip switch, 318 mhz. frequency