973lm garage door opener Features and Specifications 3 channel/button transmitter, compatible with models manufactured from 1997-present 390 MHZ Frequency, over 100 billion codes with code rotating technology Visor clip and Lithium battery (5 years life w/normal use) included Compatible with ALL Security+ systems, including Chamberlain, Sears, Craftsman and Raynor code rolling residential openers (Safety Signal)