About this item Easy to use - Integrated fully featured LCD screen. Open in the morning & close in the evening automatically by setting the timer or using the easily adjusted sunlight sensor. Coop Defender automatic door openers save you getting up in the morning and protect your chickens from predators. Simple to Setup: All-in-one design, no complicated wiring or cabling. Attach the Coop Defender door opener to your chicken coop, connect the cord to the door and you are ready to go! Note: The door will only open in the morning hours range 00:00-11:59, and close in afternoon hours range 12:00 - 23:59. If you'd like to test that the door will open and close, simply choose operating mode Light - Light, hold your hand over the sensor to simulate darkness, the door will close. Coop Defender Gold model has a door lifting capacity of 2 lbs. No minimum or maximum door heights. Highly durable cord which has a breaking strain of 50 lbs. Runs on 4 x AA alkaline batteries (included). Long battery life & low battery warning. Aluminum metal door kit included! Solid construction door panel and side runners are metal, which means it will not warp like wood sometimes tends to do in wet climates. Perfect size door opening for most breeds of poultry and duck. Approximately 9" wide by 12" tall, weighs under 2 lbs. Runners are about 24" tall. Comes with 4 wood screws. Proudly designed by Texans. Comes with a hassle-free 1 year manufacturer guarantee. Local US support. Economical, affordable great quality with a great value.