The LiftMaster 66LM will allow you to access your garage and home without the use of a key or a remote control. The LiftMaster Wireless Keyless Entry with Billion Code can open your garage door using a code that you program directly into the unit. It is for use with older 390MHz LiftMaster garage door openers that use either 9 (+/0/-) dip switches or have a GREEN learn button.
 Product Features
For use with older LiftMaster 390 MHz garage door openers
Billion code technology assures one of over 10,000 changeable codes is sent every time the keypad is used
Completely wireless – powered by one 12-volt battery (included)
Weatherproof flip-up protective cover
Backlit keypad makes numbers easy to see, even in the dark