ChickenGuard PRO Automatic Chicken Coop Door Opener and Self-Locking Door Kit Simply mount on the outside or inside of your coop, tie the cord on the door, and use the Setup Wizard to easily program your opener. The innovative self-locking door will prevent crafty predators from lifting the door open. Imported from the United Kingdom, ChickenGuard offers a solid coop door that runs off 4 AA batteries (optional USB port for external power). Opens & closes your chicken coop using a timer and/or light sensor. Manually open and close your chicken coop with a push of a button. Fully featured LCD display for ease of use. Powered by 4 x AA batteries (included) or electric powered via USB (cables not included). Helps prevent determined foxes and other predators raising the coop door. Innovative self-locking mechanism. 100% recycled tough & durable plastic. Strong aluminum door