[WITH LIGHT SENSOR]-- The ultimate automatic door for every chicken breeder The chicken coop door with light sensing system can open the door at dawn and close at dusk through the change of sunlight.[PERFECT SIZE]-- The size of the whole automatic chicken door coop is around 13.8""x 9.8"", and the interior door is around 11.8"" x 7.8"". And it"s usable for all suitable sized chickens and ducks.[EASY TO INSTALL]-- This chicken door works with 3 AA batteries (not included). No complicated wiring , easy to use and convenient to use. Kind Tips: In order to make the chicken coop door work better, do not twist the screws too tightly during the installation process.Our products are made with the highest quality materials and are designed to provide you with the best possible user experience. We strive to ship out all orders within three days of purchase, and the estimated delivery time is 8-15 days.When shopping, please pay attention to the size and dimensions of the product to ensure that it meets your needs. In the title and , we have provided detailed information about the product, including its features and specificationsWe want you to be completely satisfied with your purchase, so if you have any questions or concerns, please don''''t hesitate to contact us. We are here to help and will do our best to assist you.Thank you for choosing our product. We hope you enjoy it