12Cm diameter, powered by 4 AA batteries (not included) Function: lighting + music + beating. Provides Endless Fun and Exercise: The LED Jumping Activation Ball for dogs and cats is the perfect toy to keep your furry friend entertained for hours. Its unpredictable movement and jumping action will have your pet chasing after it, providing them with much-needed exercise and mental stimulation. Promotes Healthy Growth and Development: The ball's random movement and jumping action provide the perfect combination of exercise and mental stimulation that dogs and cats need to stay active, healthy, and at an ideal weight. It also helps prevent unwanted destructive behavior due to boredom, promoting a happy and healthy pet. Attractive Design and Color: The LED Jumping Activation Ball comes in a variety of bright, attention-grabbing colors that will suit your style and your pet's personality. Its lovely design and bright colors make it an infectious fun toy for all, attracting the attention of children and pets alike. Safe and Non-Toxic: The ball's safety standards are top-notch, with nodules securely fastened and a sturdy and conveniently located on/off button. It is designed to last longer than any normal toy and most importantly, keeps your pet safe. Perfect for Interactive Play: The LED Jumping Activation Ball is the perfect interactive toy for you to play with your pet. Its bounce, vibration, music, flashing light, and wiggle action will have your pet hooked, providing hours of fun and entertainment for both you and your furry friend.