The LiftMaster DDO8900W is a smart, heavy-duty garage door operator designed for doors weighing up to 850 lbs. Its powerful DC motor delivers smooth, quiet performance, while built-in Wi-Fi and myQ technology allow remote control, monitoring, and real-time alerts from a smartphone or other connected device. An integrated HD camera with night vision provides live video monitoring for added security, while Security+ 2.0® generates a new access code with every remote use. The Protector System® safety sensors automatically reverse the door if an obstruction is detected, and the Alert-2-Close system provides a warning before the door closes. Battery backup capability is available, but the battery is not included.