Automatic opening and closing chicken coop door. How to use the light sensor automatic door: Please install it on a sunny side! The design concept is that the door opens when the sun rises and closes when the sun sets. If you want to open and close the door when there is not enough sunlight, shine a flashlight on the part where the light is green, and the door will open! Please purchase after referring to the image. Due to hygiene reasons, returns are not accepted for any reason. Thank you for your understanding. - Product Name: Chicken House Door - Size: 24.5cm x 35.5cm - Features: Automatic opening and closing function - Material: Plastic - Application: Chicken coop door Thank you for viewing.