The econ feeder kit from american hunter features a compact and efficient design.It has a metal spin plate, built in varmint guard, and a rail mount for any additional accessories.It also uses a solar panel accessory plug in and is aa batter operated.The ez-touch digital timer has 1-4 custom time setting, 1-30 second run times, and reverse polarity protection.Digital: YesBattery: AAFeed Time Programs: 4Duration: 1-30 SecondsHousing Material: Plastic