For a higher level of security and uninterrupted convenience, we offer a 3/4 HPS* DC motor screw drive garage door opener that continues working, even when the power goes out. The LiftMaster Model 3840 features the EverCharge® Standby Power System, a battery backup technology that not only powers the opener for up to 40 full cycles within a 24-hour period but continues to power vital safety functions, such as The Protector System® safety reversing system, in the event of an electrical outage. Plus, the unit is designed with 200 watt lighting, an added benefit when entering or exiting through a dark garage.
- Fully integrated battery backup
- Meets all UL325 requirements
- Audible signal alerts power is out and battery is in use
- Lifetime motor warranty
* horsepower strength with same lifting force specifications as 3/4 HP LiftMaster garage door openers
• Auto-force feature constantly monitors garage door system and adjusts forces to temperature fluctuations, floor height, and door track movement
• High-efficiency motor delivers improved performance in extreme weather conditions
• Enclosed gear case provides continuous lubrication and protection for longer life and smoother operation
• A 6-foot power cord makes connecting to a power source easier than ever
• The Smart Garage Door Opener® lets you electronically program security codes from the Multi-Function Control Panel or the powerhead
• Delivers 200 watts of light with adjustable light time delay
• Meets all UL325 requirments
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
Lifetime motor warranty
5-year parts warranty
1-year warranty on EverCharge® Standby Power System
