Having this ball with high elasticity, you can keep the dog chasing, which not only can make the dog exercise happily, but also can train the dog's agility to help it stay healthy and strong. Waterproof, tasteless, not easy to be crushed or leave tooth marks, your dog can enjoy the fun of toy balls for a long time. The pet sound ball inserts a flash and can bounce and flash the colorful lights. It can attract the attention of pets, so you can play with your pets. It is constructed of rubber material. There are two sizes for your choice: S, L. It is a great toy for your pet for their entertainment, teeth cleaning and exercise. Item Name: Pet Toy Ball Material: Rubber Features: High Elasticity, Quick Bounce, Colorful Light Battery: 3 x Button Batteries (Included) Size Details: S, Diameter: 5cm/1.97"(Approx.) L, Diameter: 7cm/2.76"(Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Pet Toy Ball