TPR material: the light up dog ball made of TPR material is small, lightweight, safe and not easy to bite and damage the pet's body. Luminous and audible: the light up dog ball has a built-in audible light device that makes the visual effect of the dog more exciting and attracts the attention of the dog. Clean teeth: light up dog ball has been designed with a bulge and can completely rub the bulge on the tooth to promote teeth cleaning when the dog bites the toy. Exercise function: the luminous dog ball has high elasticity, so that the dog can continue to chase. It can train your dog in a happy way and train the dog's agility. Thoughtful gift for pets: light up dog ball can make the tracking of the dog more fun and relieve pressure, making it a thoughtful birthday gift for your pet or a friend's pet. Material: TPR, built-in button battery. The small is 6cm in diameter and weighs 48g. The large size is 10cm in diameter and weighs 124g. Features: bite resistance, luminous, high elasticity, environmental protection, no odor. Function: Collision light, automatically stop light after 11s. Note: 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.