A garage door opener is an electric device that automatically opens and closes a garage door. It typically consists of a motor, a remote control, and a system of pulleys and tracks. When activated, the opener moves the door up or down, providing convenient access to the garage without needing to manually lift the heavy door. Most garage door openers use either a chain drive, belt drive, or screw drive mechanism to operate. They can be controlled via a wall-mounted switch, a remote control, or even a smartphone app. Safety features often include sensors that prevent the door from closing on objects or people.