Order a safe and highly adjustable chicken coop automatic door byHappy Henhouse. Use a light sensor, which uses sunlight, or a timer, toactivate the outdoor rated controller. Powered by 4 AAalkaline batteries, the controller uses a durablegear motor to open and close your chicken coop automatically. The robust locking door resists being brokenor bent in case of a predator attack at night, thus keeping the chickens completely safe. This automated system is powered by 4 AA alkalinebatteries with 6-12 months battery life. Comes backed by a great warranty and more.