This ingenious bird feeder was selected Best by the Hammacher Schlemmer Institute for squirrel resistance, bird appeal, ease of use, and durability. It thwarts squirrels with a weight-triggered spinning circular perch powered by an internal motor that gently flips the would-be thieves aside before they can steal seed, yet birds as large as cardinals and starlings can land on the perch and feed easily from four seed ports without triggering the mechanism. The feeding tube holds 5 lbs. of seed and has an interior baffle that allows seed to flow freely without clogging. It can be hung from its durable stainless steel hanger from a pole or branch that is at least 24" from a horizontal surface, giving squirrels no option but to put their full weight on the perch to reach the seed port. Runs for up to two weeks on a 14-hour charge. 29" H x 8" Diam. (7 lbs.)