Sears Craftsman 139.53687 Compatible Multi Function Garage Door Control Panel by Liftmaster
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.