The PetSafe® RoloRat Automatic Cat Teaser is an automatic toy that moves and scurries throughout the house, activating your cat’s need to chase. The exciting movements of the RoloRat keep your cat guessing and pouncing. Allows play throughout the day. Rolling toy with crazy tail and sounds Automatic Shut-Off is convenient and saves battery life "Play-While-You-Are-Away" feature allows you to create playtime for your cat while you are not there Requires 3 AAA batteries (not included)