Open and closes the garage door using a private 4-digit code. * Compatible with all LiftMaster garage door openers manufactured starting January 1993, and all 315MHZ LiftMaster and Elite gate operators. * Compatible with yellow, purple, orange or reddish orange and green learn buttons. * Includes battery, mounting screws and instructions. * Size 6 1/4" long, 2 1/2" wide.