The Yankee Flipper comes with a motor-driven, battery-powered, weight-activated perch ring that expels squirrels when they try to get at the bird seed. When a squirrel steps on the perch, a connection is made with a motor that makes the perch spin, and the squirrel is flipped off the feeder. The unit comes equipped with a rechargeable nickel-cadmium power stick battery and a battery charger that plugs into standard 120 volt wall outlets. Sturdy stainless steel wire hanger will not rust. 21″ long tubular feeder with 5 lb seed capacity. Metal cap fits snugly so that squirrels cannot pry it off. 4-1/2″ diameter seed tube is made of UV stabilized polycarbonate for durability. Tube is long enough so that squirrels can’t hang down from the top and reach seed. Interior is properly baffled to direct seed to the seed ports. Four seed ports are positioned around the tube. Metal parts have a forest green finish.