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 uses a solar panel accessory plug in and is aa battery 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