Feature: 1. Not Easy to Rust: The door frame of the chicken cage door is made of iron sheet metal, and the door plate is made of plastic, which is safe and durable, light weight, easy to use, and there is no need to worry about rust and other problems. 2. Two Modes: The timer mode is to manually set the time of opening and closing the chicken house door according to the season, direction, and the regular time of entering and exiting the chicken in captivity, and the manual mode is to open and close the chicken house door by hand pulling and pressing 3. Easy to Use: Easy to program buttons. Automatic opening in the morning and automatic closing in the evening, which is safer. 4. Wide Application: Suitable for all kinds of chickens and ducks. it will bring convenience to your chickens, ducks and other poultry! 5. LED Display Controller: It is equipped with a high definition LED display controller. The time setting is clear and easy through the buttons at the bottom. The specific time of opening and closing the chicken house door can be clearly seen through this display. 6. Battery Power Supply: The controller of the automatic metal timing rolling shutter chicken house door needs battery power supply, without complicated wiring, and can be used only by installing the battery in the correct position. Specification: Item Type: Automatic Chicken Coop Door Weight: Approx. 1915g / 67.55oz Material: Iron Sheet Metal, Plastic Product Size: Approx. 37 x 24.7cm / 14.6 x 9.7in Opening Size: Approx. 28.5 x 20.5cm/11.2 x 8.1in Applicable Objects: Chicken, Duck and Goose Controller Product Size: Approx. 11.2 x 10.2 x 3.5cm/4.4 x 4.0 x 1.4in Height with Hook: 11.6cm/4.6in Inner Diameter of Hook Hole: Approx. 12x11mm / 0.5x0.4in Controller Battery (Shipped Without Battery): AA Dry Battery or Lr06 Alkaline Battery x 3 . Package List: 1 x Automatic Chicken Coop Door1 x Controller6 x Screws (Extra is a Gift)1 x Screwdriver1 x Instructions Note: Precautions for battery use:1. Do not use rechargeable batteries in the device.2. The new battery and the old battery shall not be mixed. Before inserting the battery, make sure that the battery is inserted with the correct polarity (positive "+" and negative "‑"). Remove the battery from the device and handle it safely.3. If the device is idle for a long time, remove the battery. The power terminal shall not be short circuited.