LIFTMASTER model MJ commercial opener is a 1/2hp jackshaft drive. It is part of the commercial opener. This garage door opener has an ac motor on 110vac. A battery backup is not available. The remotes are dip switch on 315. The rail is style is None.
The warranty on the MJ garage door opener is 2 years on the motor and 2 years on the remaining opener parts from LIFTMASTER.
The model MJ is still available.
LIFTMASTER model MJ commercial opener brochure in PDF format at NO CHARGE!
VIEW / DOWNLOAD by clicking HERE
liftmaster_mj_brochure_23.pdf
(0.91 MB in English) This requires Acrobat 10 or higher