Ultra Quiet Screw Drive Opener
LiftMaster 3840 battery back-up Garage door opener
DC Motor Screw Drive with EverCharge® Standby Power System Our newest opener and newest addition to our Elite Series™ line, the LiftMaster® 3840 3/4 HPS® DC Motor Screw Drive with EverCharge® Standby Power System is the only screw drive garage door opener on the market with fully integrated battery backup technology. It can power the garage door opener for up to 40 full cycles within a 24-hour period in the event of a power outage, and recharges automatically when the power comes back on. Not only that, it has the added features of our exclusive screw drive opener design: it is specially engineered to run smoothly and quietly in extreme temperatures, and has a self-lubricating, maintenance-free rail system.
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SAFETY & SECURITY FEATURES
- The Protector System® safety sensors project an invisible light beam across the garage door opening and automatically reverse the door if anything interrupts the beam while the door is going down
- Sensing technology will stop the door from closing if contact is made with a person or object
- Opener light turns on automatically when The Protector System's infared beam is broken
- Patented technology detects when a door spring breaks and triggers the motor to reverse the door to the full open position
- Security+® rolling code technology assures a new code is sent every time the remote control is used
- Patented PosiLock® system ensures the door remains securely locked when the garage door is closed
- Manual release handle in case of power failure
WARRANTY
- Life time motor warranty
- 5-year parts warranty
