Easy to use: easy to program buttons. It automatically turns on in the morning and turns off at night. You can set a timer or use the built-in light sensor (LUX). Requires 3 AA batteries, can be replaced in 3 minutes without a solar panel Plug and Play technology : the door can be installed in less than 10 minutes (no complicated wiring or wiring required). Work in extreme weather conditions: waterproof, work in snow, rain and dust from - 26C to 60C (-15F to 140F). All-in-one design - Made in one cast: solid aluminum door and slider. High quality fine powder coated paint (for outdoor environment). Product Light-sensitive automatic chicken coop door for pets. Material: brown plastic Dimensions: 35 x 24 x 3.7cm Dimensions: 35 x 24 x 3.7cm Inner carton: 25 x 5 x 36cm Product weight: 400g / 480g with carton interior. Requires 3 AA batteries. Magnet: the motor contains magnetism. Function: light sensor (strong light to open the door, dark to close the door) , lift, waterproof (IP44). Contents: 1 chicken coop door. Notes: 1. Due to many factors such as light and brightness of the monitor, the actual project color may be slightly different from the color shown on website. 2. Please allow slight size difference due to the measurement data. 3. Dimensions may vary from 1 to 3 cm. 4. When buying clothes or shoes, please measure your size and choose according to our size. The size chart is in the picture.