LIFTMASTER model 850LM receiver. It receives using dip switch code (fixed), rolling code (changes each time) on frequency MyQ (310, 315, 390 MHz).
The warranty on the 850LM garage door receiver is 1 year from LIFTMASTER.
The model 850LM receiver brochure in PDF format at NO CHARGE!
VIEW / DOWNLOAD by clicking HERE
liftmaster_850lm_brochure_16.pdf
(1.88 MB in English) This requires Acrobat 10 or higher