Designed for long-term use: Coop door openers are designed for long-term use(br) With no wires or cables, the opener is powered by 3 AA batteries (batteries not included)(br) No complicated wiring means low risk of default(br) In addition, the coop door opener is made of high-quality plastic(br)EASY TO INSTALL AND SETUP: Coop door openers come with detailed instructions(br) You don't need to assemble the door opener, just install it in the correct location(br) We also provide auxiliary cardboard to our valued customers(br) Everyone can install our product in 10 minutes(br)All for your convenience: The concept of automatic chicken coop doors is for the convenience of our valued customers(br) The battery compartment is located on the surface of the drive system, eliminating the need to remove the cage to replace the battery(br)Protection procedures: The coop door has a protection mechanism(br) If the door hits the chicken, it stops automatically(br) Don't worry about hurting your cute chick(br) Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-Dadangjia