This Liftmaster 635LM plug in radio receiver is the perfect replacement unit for applications where the installed receiver is no longer working or you want to use LiftMaster, Chamberlain, Sears Craftsman 390 MHz remotes with your existing opener.
The LiftMaster 635LM will work with one of the following combinations:
-Up to 8 Security+ Formatted Remotes (971LM, 972L, 973LM, or 974LM) OR
-Up to 12 Billion Code Series remotes (81LM, 82LM, 83LM, or 84LM).
-Enhanced Radio Technology (ERT), replaces all 395 MHz frequency transmitters and receivers
-Plugs into standard 120V, 60Hz AC outlet
-Includes bell wire to connect to your garage door opener, allows for easy access to program additional remotes
-Accepts multiple remote controls and one wireless keypad.
-Will work with any brand of garage door opener