LIFTMASTER model 976LM keyless entry. It transmits using rolling code on frequency 390.
The warranty on the 976LM garage door keyless entry is 1 year from LIFTMASTER.
The model 976LM is discontinued.
LIFTMASTER model keyless entry instructions and owners manual in PDF format at NO CHARGE!
VIEW / DOWNLOAD by clicking HERE
liftmaster_976lm_om.pdf
(0.36 MB in English) This requires Acrobat 10 or higher