Liftmaster 974LM 390 MHz Garage Door Remote Transmitter
4 channel transmitter, compatible with models manufactured from 1997-present.Compatible with ALL Security+ systems, including Chamberlain, Sears, Craftsman and Raynor code rolling residential openers (Safety Signal) 390 MHZ Frequency, 100 Billion codes with code rotating technology .Visor clip and Lithium battery (5 years life w/normal use) included