An 11" wide, 15" tall, all aluminum construction automatic coop door. It comes fully assembled in an aluminum frame and installation is a snap. This product has the option of manually programming open/close times or operation by a photo sensor (option). The door may be powered by any 12 volt DC power supply, a float charger with a battery (option), or a solar panel with 10 feet of wire and a battery (option). The motor is fully enclosed, so you don't have to worry about dust and grim interfering with its operation.