Item Type: Automatic Chicken Coop Door Material: Iron sheet metal, aluminum alloy. Category: Intelligent Devices Applicable Objects: For chickens, ducks, geese. Product Size: Approx. 35 x 24.3cm / 13.78 x 9.57in Door Opened Size: Approx. 25 x 20cm / 9.84 x 7.87in Host Battery: 3 x AA Dry cell or LR06 alkaline battery, shipped without battery. Remote Control Battery: 1 x CR2025 button battery, shipped without battery. Solar Panel Battery: 18650 lithium ion battery, 1200mAh, shipped without battery. Power Supply for Chicken Coop Door: Battery or solar panel power supply. Control: Supports light sensing, timing, remote control. Weight: 1410 g / 49.74 oz(approx.) Package List: 1 x Automatic Chicken Coop Door  10 x Screw 1 x Screwdriver 1 x User Manual 1 x Solar Panel 2 x Solar Panel Bracket Accessory 1 x Remote Control Note: 1. Do not use rechargeable batteries in the device. 2. New and old batteries shall not be mixed for use. Before inserting the battery, make sure to insert it with the correct polarity of positive + and negative ‑. Remove the battery from the device and handle it safely. 3. If the device is idle for a long time, the battery should be removed. The power terminal must not be short circuited. 4. In remote control, large obstacles can affect sensing. 5. Only natural light during the day can be sensed by light sensor, and the light sensor can only be used for door opening because it may easily close the door too early and affect the entry of chickens. The fixed door can only be closed through timing. 6. Random screwdriver.