MJ Medium Duty Jackshaft Garage Door Opener
MJ- Medium Duty Jackshaft Opener
The Liftmaster Model MJ is a Medium Duty wall mount garage door opener for light commercial applications. We often install the MJ at Auto Dealers and Car Washes. This opener is great when the property owner wants power, but generally opens and closes their door only a few times an hour. The Model MJ comes standard in 115 volt single phase power.