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LIFTMASTER model 377LM keyless entry. It transmits using rolling code on frequency 315.

The warranty on the 377LM garage door keyless entry is 1 year from LIFTMASTER.

The model 377LM is discontinued.

LIFTMASTER model keyless entry instructions and owners manual in PDF format at NO CHARGE!
VIEW / DOWNLOAD by clicking HERE
liftmaster_377lm_om.pdf

(0.58 MB in English) This requires Acrobat 10 or higher