Feature:1. Perpetual Motion: The perpetual motion machine has simple shape, unique and complex design, which can keep the ball rolling all the time, and can be used as a toy or decoration.2. ABS, Stainless Steel Material: The perpetual motion machine is made of premium ABS material, and the wire is made of stainless steel, which is colorful and durable.3. Educational Toy: This perpetual machine toy is very suitable for children to enjoy the charm of scientific physics, improve their ability to explore the mysteries of science, and bring them great happiness and curiosity.4. Easy Using: The toy operates with no noise, it can work for 4 to 5 hours after 1 charge. Touch switch is convenient for your use.5. Gifts for People: This interesting toy is an ideal gift for your friends, family and colleagues. Very tasteful gift!Specification:Item Type: Perpetual Motion Machine Desk ToyProduct Material: Plastic, Stainless SteelBattery: Polymer lithium battery 2000mah (shipped with built in battery)Weight: Approx. 700 g / 24.7 oz.Package List:1 x Perpetual Motion Machine Desk Toy1 x Charging Cable 5 x Marble1 x English Manual