The Chamberlain 740CB will allow you to access your garage and home without the use of a key or a remote control. The Chamberlain 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/Chamberlain garage door openers that use either 9 (+/0/-) dip switches or have a GREEN learn button.
-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