A garage door opener is a device that automatically opens and closes a garage door. It consists of a motor, a gearbox, and a transmitter. The motor is connected to the gearbox, which in turn is connected to the door. The transmitter is used to send a signal to the motor, which then opens or closes the door.
Garage door openers are a convenient and secure way to open and close your garage door. They can be programmed to open and close at specific times, and they can also be controlled remotely using a smartphone app. Some garage door openers also have built-in security features, such as motion detectors and alarms.