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 and spin. Enticing your cat to swat, leap, and pounce. Helping to keep your cat mentally alert, physically fit, and at a healthy weight. Replaceable AAA batteries are included. A screwdriver is needed to replace the batteries.