The Yankee Flipper is the definitive squirrel proof bird feeder. Birds love to eat from it, but grey 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, hence the name Yankee Flipper. The metal cap prevents squirrels from reaching seed from the feeder top. An internal baffle design keeps seed flowing freely to the ports. The clear feeder reservoir is made of UV stabilized polycarbonate for long lasting durability without yellowing. The cap and feeder base are green powder coated metal. The motor and batteries are encased to protect from moisture. Lock down screws allow you to shut off the feeder. Hang the Flipper from its looped stainless steel wire for secure hanging and to reduce motion. The unit comes equipped with rechargeable NiCad batteries and a battery charger. The feeder carries a Lifetime Warranty. The warranty on the motor and battery unit is limited. Made in USA.