Features QUALITY MATERIALS: Made of high-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 time. LED LIGHTING EFFECT: Equipped with bright LED light rings, it can be clearly seen in dim environments, 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, then enter standby mode. PROMOTES MENTAL AND PHYSICAL DEVELOPMENT: This toy provides physical exercise and stimulates mental development. Your pet can engage in different activities such as solving puzzles and chasing moving parts, supporting healthy growth through play. PERFECT FOR SMALL TO MEDIUM DOGS: Specially designed and sized for small to medium dogs, accommodating various breeds and providing an interactive experience suited to your dog's play style. Notice: 1. Actual color may be slightly different from the image due to different lighting effects. 2. Please allow 1-3 cm deviation due to manual measurement. Material: PCPET Diameter: 52 mm Battery Capacity: 150 mAh Accessories: 1 charging cable Package List: 1 x Shaky Ball Toy for Dogs