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 EASY TO USE - Easily programmable pushbutton. It automatically opens in the morning & closes in the evening. You can set the timer or use the integrated (LUX) Light Sensor. WORKS IN EXTREME WEATHER - Waterproof ; will work in snow, rain, and dust from -15F to 140F (-26C to 60C). ALL IN ONE DESIGN - One piece; full aluminum doors and slider. High-quality powder-coated Fine structural color (explicitly designed for the external environment). About Shipping: All items will be shipped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances.Any questions, please feel free to contact us During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 24 hours, wish you a happy shopping Thanks for your cooperation and we"ll make you feel satisfied. 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 specifications We 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