This gate remote control LIFTMASTER 333LM has a frequency of 315MHz and has 3 button(s). It comes with an instruction and batteries. The Programmation of the remote is easy and doesn't require any special equipment. This remote contains 9 dip switches with 3 positions (trinary). Compatible with Liftmaster. Chamberlain and Sears between 1982 and 1992. and smart button coding between 1993 and 1997