Liftmaster Garage Door Opener 8550

 The model Liftmaster 8550W door  opener .  The opener recharges automatically when the power comes back on; an audible signal tells you when the power is out and the EverCharge® Standby Power System is in use. This opener includes the MyQ Technology, now equipped with Wi-Fi, that allows to monitor, open and close your garage door from your smartphone, your tablet or your computer, and that from anywhere in the world. 

• Drive system: Belt Drive