This is Tuya Smart WiFi Garage Door Sensor Opener Controller Compatible with Amazon Alexa Echo Google Home, No hub is required, 

The Garage smart controller uses to work with the Garage open and close, which can controlled by the phone,  

it is easy to install and without any changes in your Garage,  you will have these great function to open and close the garage door by phone, by schedules, by voice , Query status, query open/close records, etc.