Digital Battery Operated Timer for the Automatic Chicken Coop Door Opener (BS-D) Set the precise time for your VSBb Automatic Door Unit with or without the light sensor mechanism Quartz Accurate and Rugged Dust Tight Housing Comes with 2 AA alkaline batteries and 30" length wire, and a closed jumper wire to override the light sensor completely New English Instructions for this Quasi-Analog VSBb Accessory Cables with Connectors