This action-packed toy hangs on any standard door knob. One end of a long, brightly-colored, silky cord (string) is sewn (with an industrial strength sewing machine.) onto a white elastic “conveyer belt” which is constantly rotating. The string flings in and out for kitty’s non-stop amusement. Cats can bite, paw, claw, pull, and ultimately STOP the string. As soon as they let go, the string automatically starts to rotate again and again and again. The toy has 2 speeds for the frisky or faint feline. Just turn it on, take a seat, and watch kitty go.