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. To know more you can visit us at : https://happy-henhouse.com/products/automatic-chicken-coop-door-opener-kit-light-sensor-activated-battery-powered-shipping-box-damaged-or-demo