Openings Built To Last.We offer a comprehensive line of Sectional Overhead, Rolling Steel, and Rolling Sheet doors. Choices include storage doors, service doors, service fire doors, rolling grilles, light-duty and heavy-duty sheet doors, certified windload sheet doors, and a variety of insulated and non-insulated sectional doors.
DC Motor Belt Drive with EverCharge® Standby Power System Now when the power goes out, your garage door opener will still work. The LiftMaster® 3850 is the only 3/4 HPS®* professionally installed opener with a fully-integrated standby power system. It will operate the garage door opener for 40 cycles within a 24-hour period, and recharges automatically when the power comes back on; an audible signal tells you when the power is out and the EverCharge® Standby Power System is in use.
