Security+2.0TM rolling code anti-theft technology. One button to close feature. Backlit keypad makes numbers easy to use in the dark. * Temporary password option enables visitors or delivery and service personnel to enter the garage. The temporarily PIN can be set for a number of hours or a number of garage door openings. * Compatible with Security+2.0TM MyQTM LiftMaster garage door openers or gate operators and Craftsman AssureLinkTM garage door openers by Sears. * All Security+2.0 garage door openers have a round yellow Learn button and two yellow antennas. * Includes battery, mounting screws and instructions. Size 6 1/4" long, 2 1/2" wide.