This LiftMaster 78LM is a direct replacement for the Sears Craftsman 139.53687. The unit is a Multi Function wired 3 button control panel. This unit allows you to open your garage door from inside the garage. Additional features of this unit are the remote lockout function (Security+ openers only) and the ability to turn the openers light on or off.
This unit will work with all LiftMaster, Chamberlain, and Sears Craftsman openers made since 1995. Kit includes the control and bell wire to directly connect this unit to your garage door opener.
-3 Control buttons (Door Open/Close, Light On/Off, and Remote Lockout)
-Includes bell wire
-Works with openers made since 1995
-Dimensions: 3 x 5 x 1 inches