FeaturesQUALITY MATERIALS: Made of quality PCPET material, this dog toy is sturdy enough to withstand pet bites and scratches. Maintains durability in both smart and normal mode and can be used for a long timeLED Lightings Effect: Equipped with a bright LED light rings, it can be clearly seen in a dim environment, adding fun to night walks or indoor gamesSmart-Activation: When your dog touches or bites it, the shaking dog ball will automatically roll and rotate for 5 minutes, and then enter standby modePROMOTES MUSTRIAL AND PHYSICAL DEVELOPMENT: This toy not only provides physical exercise but also stimulates the mental development of your pet. Your pet can choose different modes according to your preference, such as solving puzzles, chasing moving part, and allowing you to experience a full growth while playingPERFECT FOR SMALL TO MEDIUM DOGS: Specially designed and sized for small to medium sized dogs to accommodate a variety of breeds, providing an interactive experience to suit your dog's needs and style of play. Notice:1.Actual color may be slightly different from the image due to different light effect2.Please allow 1-3cm deviation due to manual measurement Description:Material: PCTPEDiameter: 52mmBattery Capacity: 150mahAccessories: 1 charging cable Package List:1x Shaky Ball Toy for Dogs