Features: This high-end double-wheel motion device features a large electric magnetic double swing chaos pendulum, making it a unique and fascinating addition to any household or workspaces. The motion device power by coil within base that generate a magnetic field when creating an attractive force with the magnets on the support bracket and achieving the effect of motion. It is perfect for both science education and home decors, offering a fun and engaging way to learn about physics while add elegant to your surroundings. Fit for students, teacher, physics enthusiasts Place it on your desk, shelf, or any other flat tops to sophistication to your surroundings. The motion device is perfect for use in homes, schools, offices, and more The product may makes some noise due to metal friction with metal, please be cautious when placing your order. Specifications: Material:Metal+Plastic Size:Approx.31x10.5cm/12.2x4.13in Option Type:Rudder-shaped Motion Toy,Semicircle Motion Toy,Type 3 Motion Toy, Circle Motion Toy; Package Includes: 1xDouble Wheel Motion Toy note: Please allow 1-2cm errors due to manual measurement,please make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.