Features QUALITY MATERIALS: Made of quality PC+PET 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 time. LED Lighting Effect: Equipped with bright LED light rings, it can be clearly seen in a dim environment, adding fun to night walks or indoor games. Smart-Activation: When your dog touches or bites it, the shaking dog ball will automatically roll and rotate for 5 minutes, and then enter standby mode. PROMOTES MENTAL 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 preference, such as solving puzzles, chasing moving parts, and allowing your pet to experience full growth while playing. PERFECT 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 Actual color may be slightly different from the image due to different lighting effects. Please allow 1-3 cm deviation due to manual measurement. Description Battery capacity: 200 mAh Size: 52 mm in diameter Include:1x Automatic Rolling Dog Ball