This GIOATY Universal Garage Door Opener Keypad is compatible with Liftmaster, Chamberlain, Craftsman, and Wayne Dalton openers produced since 1993; wireless keypad keyless entry, replaces 877/878MAX 377/977/877/66LM. The keypad is new and complete with instructions in its original box -- box opened only to photograph contents for this listing. See photos for size and condition.