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Liftmaster Garage Door Opener

DC Motor Belt Drive with Integrated EverCharge Battery Backup System Now when the power goes out, your garage door opener still goes up. The stylish 3850 has a unique feature that no other system can offer. It´s the only opener with the patented EverChargeTM battery backup system built right in to power the opener and all of its safety features when you need it most. Always charged and ready, it provides the highest level of safety and convenience imaginagle. Plus, it´s possibly the quietest system ever created. The powerful 12V DC motor features a belt drive system that provides ultra-quiet operation, along with smooth start and smooth stop to reduce the noise of the garage door as it opens and closes. Perfect for homes with a room above the garage. The Difference... Chamberlain® offers the only opener that features an integrated battery backup system to reliably lift and close the garage door even when the power goes out. Ultra-quiet DC motor with belt drive system Our very best accessory package Now you can still operate your garage door opener for 40 full cycles within a 24-hour period if your power is down Safety and security features will continue to operate, ensuring your family is still protected in a power failure Alerts you when in use - an audible signal tells you when the battery backup system is operating MODEL 3850 STANDARD FEATURES Part of our Elite Series... designed to exceed expectations Strong and silent DC motor provides smooth start and stop operation for less wear and tear Enclosed gear case - provides continuous lubrication and protection for longer life and smooth operation Delivers 200 watts of light to fully illuminate your garage INCLUDED ACCESSORIES Premium motion-detecting control panel - it sees you coming! Turns garage door opener lights on automatically when you enter a dark garage...hands free! An attractive 3-button burled walnut remote control with Anti-Burglary technology OTHER SAFETY AND CONVENIENCE FEATURES New enhanced range - open and close your garage door from greater distances Includes The Protector System®  - projects an invisible light beam across the garage door opening and automatically reverses the door if anything interrupts the beam while door is going down Equipped with  PosiLockTM - stops intruders by securely locking the garage door when it is down Non-yellowing hinged light lens for easy bulb replacement Length of time light stays on is adjustable from 1.5 to 4.5 minutes Manual release in case of power failure WARRANTY Lifetime warranty on motor and drive belt 5 year parts warranty 1 year on EverChargeTM Battery Backup System