1. Install the metal automatic chicken coop rails and door 2. install motor centered above the center of the sliding door 3. Set your raise and lowering heights by rotating the dial on the motor to the meet your poultries specific door size requirements 4. Set the timer by setting your open and close times. Its really that easy! This kit automatically opens and closes the door on a time schedule you choose. Simply plug it into the timer and it protects your hens and eggs, and saves you valuable time every day. Has a reversible motor with adjustable stop settings to customize the door opening size to meet your flocks needs. Motor: It stops door at open and closed positions you set. There is no counter-weight needed. Motor can lift and lower a door up to 15 pounds, with door openings up to 22 inches before reaching the max travel distance of the provided metal tracks. Includes motor, timer, metal door and tracks, all mounting hardware, AC-DC Adapter, lift-cable, and illustrated instructions. You decide what time your chicken coop door opens and closes – thereafter it’s automatic! Sleep a little later, The motor can open the door each morning allowing your hens to feed or free-range on their own. If you arrive home late, or if the weather is so poor you can’t attend your coop on-time, you can relax because chickens enter the coop about the same time every day, and the motor and door will automatically close secure your coop even when your not home. MINIMUM HEIGHT REQUIREMENT: 29" for the entire kit to function properly. SOLAR/BATTERY: This is AC powered but can easily be converted to DC power. The motor itself is already DC powered and the power cord is a switching power supply to convert to AC power. This means you can cut the transformer off the end of the cord and splice the wire and connect it directly to your 12V DC timer, battery, and solar panel. No costly AC to DC power inverters needed.