Compatible with all LiftMaster Security+ remote controls
Plugs into standard polarized 120V, 60Hz AC outlet
Includes 2-conductor bell wire
Hard wires directly to any garage door opener strip
Accepts up to 8 Security+ remote control codes, and accepts one 976/977LM keypad
Product Description LiftMaster 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, that's it! The code between the remote and receiver changes with each use.