This remote control is for use with older model LiftMaster® garage door openers (390MHz only). It features computer-programmed private security codes and can
operate a single garage door opener. Includes one 5-year 3-volt battery.

Product Description
Compatible with the following models:
Liftmaster 82LM, 83LM... or ALL green LED light transmitters
Chamberlain : 850CB,853CB,856CB
Sears :139.53707, 139.53870, 139.53779, 139.53879, 139.53800, 139.53637SRT
Also compatible with wireless keypad model number 66LM (same as model 740CB,
139.53776, 139.53876)
390 MHZ Frequency, compatible with operators manufactured between 1993-1997
"Smart" coding button with GREEN LED
2 channel transmitter
compatible with the "Billion Code" series
Visor clip and Lithium battery (5 years life w/normal use) included