LIFTMASTER model 8557W residential opener is a 3/4hp belt drive. It is part of the elite series. This garage door opener has an ac motor on 110vac. A battery backup is not available. The remotes are rolling code on MyQ. The rail is style is Solid T.
The warranty on the 8557W garage door opener is Lifetime on the motor and 5 years on the remaining opener parts from LIFTMASTER.
The model 8557W is still available.
LIFTMASTER model 8557W residential opener brochure in PDF format at NO CHARGE!
VIEW / DOWNLOAD by clicking HERE
liftmaster_8557w_brochure_15.pdf
(0.20 MB in English) This requires Acrobat 10 or higher