The #TT-00629-GB 3.5" Medium/Small ball is for dogs 15-40 lbs. With the Talk to Me Treatball your dog will never be home alone again. Record your message and the motion activated replay will talk to your pup while you’re away. The 3.5" ball dispenses treats while your dog plays and the recorded message entices him to play. Lots of fun for you and your pet! Available in several colors, styles and sizes.