Function:1.Perpetual work: The permanent exercise machine has a simple shape, unique and intricate design, which can keep the ball rolling all the time, can be used as toys and ornaments. 2. ABS and Stainless Steel Material: The permanent agency uses high-quality ABS material, and the wire is made of stainless steel, so it is colorful and durable. 3. Educational toy: This permanent mechanical toy is very suitable for children to enjoy the charm of science physics, improve their ability to explore science mysteries, bring great happiness and curiosity. 4. Easy to use: The toy can operate silently and can be used for 4-5 hours on a single charge. 5.Touch switch is convenient GIFTS FOR PEOPLE: This funny toy is an ideal gift for friends, family and colleagues. A very classy gift! Specifications: Item Type: Perpetual Motion Machine Desk Toy Product Material: Plastic, Stainless Steel Battery: Polymer Lithium Battery 2000mah (Shipped with built-in battery) Weight: Approx. 27.6 oz (700 g) / 24.7 Package List: 1 x Perpetual Motion Machine Desk Toy 1 x Charging Cable 5 x Marble1 x English Manual