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Order a safe and highly adjustable chicken coop automatic door by Happy Henhouse. Use a light sensor, which uses sunlight, or a timer, to activate the outdoor rated controller. Powered by 4 AA alkaline batteries, the controller uses a durable gear motor to open and close your chicken coop automatically. The robust locking door resists being broken or bent in case of a predator attack at night, thus keeping the chickens completely safe. This automated system is powered by 4 AA alkaline batteries with 6-12 months battery life.