Liftmaster 635LM universal receiver plug-in (security +)

- Security+ technology, replaces pre-1983 receivers with discontinued transmitters

- Easy to install, simply use your existing wall buttons' wires and plug into a wall outlet

- The code between the remote and receiver changes with each use

- Over 100 billion possible codes using Security+ remotes, however, this item will accept ALL older remotes as well

- Accepts multiple remote controls utilizing up to 8 functions, and one Security+ keyless entry

- Will work with Lift-Master, Sears, Craftsman or Chamberlain remotes