SmartyKat Twirly Tail electronic motion cat toy hangs on doorknobs for entertaining solo play. With a press of a button the long stretchy knit tail complete with feathers and raffia, will randomly twirl & spin. Enticing your cat to swat, leap, and pounce. Helping to keep your cat mentally alert, physically fit, and at a healthy weight. Replaceable batteries included. A screwdriver is needed to replace batteries.