Lawn Ornament Outdoor Bird Feeder Droll Yankee Flipper Squirrel Proof Bird Feeder - Droll Yankee Flipper Squirrel Proof Bird Feeder - 21in long, 4 ports, 4 qt. capacity. This is the definitive squirrel proof bird feeder! Birds love to eat from it, but squirrels are prevented from eating from it in a way that will make you smile. The weight-activated feeding perch is calibrated to react to a squirrel's weight. 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. Thus, the name Yankee Flipper. The unit comes equipped with rechargeable ni-cad batteries and a battery recharger. Highly functional: allows song birds to eat, including cardinals, but NOT squirrels. Beautifully designed: birds love to eat from it. It looks great in every backyard. Place it anywhere, and squirrels still can't feed from the feeder. Sturdy stainless steel wire will not rust. 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. Carries a lifetime warranty on the feeder and limited warranty on the motor and battery unit.