Liftmaster 33LM garage door opener 390mhz

List Price: $36.95
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Help, Troubleshooting, and Instructions

Liftmaster garage door opener 33lm

Will not work on openers or remotes that end with a "C" used in Canada operating on 315Mhz.

Features & Specifications

Activates up to three one channel radio receivers or one 423LM 3-channel receiver.
Red LED light indicates battery strength.
Color coded buttons for easy identification.
Visor clip included.
Power: 12 volt battery included
Frequency: 390 MHz
Codes: 9-trinary DIP switch's with 19,683 combinations
Dimensions: 3.5 x 1.6 x 0.6 inches