The 5 lb capacity Yankee Flipper bird feeder is a motor driven, battery-powered, weight-activated squirrel-proof feeder. It allows the birds to eat and saves seed by keeping squirrels away. This motorized feeder will send squirrels on a wild ride and keep them away from your bird feeder. The Yankee Flipper has a motorized perch ring that is specially calibrated to go-off under the weight of a squirrel. The perch ring will accommodate bigger birds, like cardinals and woodpeckers, squirrels will be promptly discharged. The clear 17 in UV-stabilized polycarbonate seed tube is too long and large in circumference for squirrels to navigate. It will hold 5 lb of seed that is only accessible from the ports around the perch ring. The clear polycarbonate helps you keep track of seed levels. A heavy, snug-fitting cap sits firmly in place atop the feeder and can only be lifted by humans, not squirrels. The Yankee Flipper's metal parts are powder-coated in a lovely forest green that will resist chipping and fading. Hanging is a cinch with the sturdy stainless steel looped hanging wire. The feeder body is backed by Droll Yankees lifetime warranty against squirrel damage, as well as a limited warranty on the electronic components.