Liftmaster 333LM 3 Button Remote Control Transmitter is a 315 MHz Tri-Colored remote billion code transmitter. Works on LiftMaster, Chamberlain, and Sears openers with Digital systems 1982 to 1992 and Smart button coding systems 1993 to 1997.
- Open/close/stop, visor style remote.
- Red LED light indicates battery strength.
- Color coded buttons for easy identification.
- Visor clip included.
- Power: 12 volt battery included
- Frequency: 315 MHz
- Codes: 9-trinary DIP switch's with 19,683 combinations