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Billion code simply programmed from your garage door openers smart button.
Works with most Liftmaster Sears and Chamberlain garage door openers manufactured between 1993 and 1997. Replaces Liftmaster 81LM, 82LM and 83LM transmitters also Chamberlain 850CB, 853CB and 856CB. Works with Sears 139.53800, 139.53870, 139.53779, 139.53707, 139.53879 and 139.53637
One 83LM transmitter, visor clip, battery and programming instructions