8550WLB DC Battery Backup Belt Drive Wi-Fi Garage Door OpenerFeatures belt drive system and DC motor for quiet operation.Built-in Wi-Fi® allows for smartphone control with the myQ® app.Battery Backup allows you to open/close your door even when the power is out.Automatic Garage Door Lock capable (lock not included).Enables secure in-garage delivery for Amazon Prime packages. Check availability in your area. FEATURES Home Connectivity with myQDOWNLOAD THE FREE myQ APPEasily ConnectEasily connect to a home network with built-in Wi-Fi®.Syncs WithSyncs with popular smart devices and platforms.Visit myQ.com for details. PowerVirtually SilentKeep living spaces virtually silent with the extra-strong belt drive system.Battery BackupGet in and out when the power’s out with Battery Backup. Meets California SB-969.DC MotorEnjoy extra peace and quiet with the long-lasting DC motor.Smooth StartExtend hardware life and reduce maintenance with smooth start/stop operation. Safety and SecuritySecure CodeConfidently know that every click sends a secure code to the garage door opener.Safety SensorsProtect people and vehicles with safety sensors that stop the door from closing on obstructions.Automatically ProtectAutomatically protect against forced openings of the garage door. Key by Amazon In-Garage DeliverySafe and Secure PackagesEnables secure in-garage delivery for Amazon Prime packages.Real-Time UpdatesMonitor and control your deliveries from your smartphone.Are You Ready for In-Garage Delivery?Check to see if you are eligible or learn how to set it up. Check now.Simple SetupEligible Prime Members simply download the Key by Amazon App and link it to your myQ account. SPECIFICATIONS Drive Type Belt Battery Backup Yes Security / Lock Yes Soft Start / Stop Yes AC / DC DC Lights Turn On When Entering Garage Yes Smartphone Control Yes Timer To Close Yes WARRANTY Accessory Warranty: 1 Year Battery and Remote ControlBelt Warranty: LifetimeMotor Warranty: LifetimeParts Warranty: 5 Years