Chamberlain LiftMaster 423LM Universal 3-Channel Coaxial Receiver
Can operate three residential garage door openers with series 60 controls (LiftMaster Digital - red LED light). You can instead use up to four remotes/keypads from the 80 series (Billion Code - green LED light).
Can also be operated with 3-button controls and commercial switches with open, close and stop functions.
Powered with 18-35V AC/DC.
Included: 8" external whip antenna.
For use with openers operating at 390MHz.