Design for Long Term Use: Our chicken coop door opener is designed for long-term use. There is no wiring or , the opener is powered by 3XAA batteries (batteries are not included). 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 Easy to Install and Set: Our chicken coop door opener is equipped with detailed instructions. You do not need to assemble the door opener, you just need to install it in the right place. All For Your Convenience: The concept of Our automatic chicken coop door is all for our valued customers' convenience. The battery box is at the surface of system, no need to uninstall the chicken coop to change batteries. Colour:brown Material:plastic Size:35.5 x 24.5cm Package Contents: 1 x Automatic Chicken Coop Door Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.