LiftMaster Model 3850 Garage Door Openerby Chamberlain

  • Source: BUILDING PRODUCTS Magazine
  • Publication date: 2007-01-16

An integrated EverCharge battery backup system on the new LiftMaster 3850 garage door opener is designed to operate the opener for 40 full cycles within a 24-hour period during a power outage. The opener's ultra-quiet 12-volt DC motor features a belt drive system and smooth start/stop operation. In battery backup mode, all vital safety functions operate. A motion-detecting control panel allows hands-free opener light activation when the garage is entered through an access door. Several features allow for quick wiring and setup. 800-528-5880.