If cats had opposable thumbs and a checking account, this is what they'd buy for themselves! Battery-operated Two speeds Hangs on a standard door knob Why We Love It: The Fling-Ama-Sring Cat Toy is a high-energy cat toy that will provide hours of non-stop entertainment! One side of a long string is sewn to a flat elastic conveyer belt that is constantly roating. The string flings in and out for a kitty's amusement. This toy has two speeds for the extra- ambitious feline! Batteries not included.