Features: brand new and high quality Craftsmanship: Using ABS base, strong metal frame, stable structure, long‑term use. Unique ferris wheel, fashionable, was good indoor ornament.2 Powered Way: Powered by USB charging or 2xAAA Batteries (Batteries Not Included), with USB cable, not including battery. Perpetual motion model: After installation, gently shaking it with your fingers, and the device will start to rotation.Once put in batteries, or plug in USB power source, it will keeps going and on until you stop it or power off. Science model: It was also great for those enthusiastic about science or to demonstrate the physics in science classrooms.The funny toy will make you feel how charming the science was.The electronic perpetual motion was educational and science gadget,good helper to reduce stress when you are bored.Desktop entertainment,entertain your colleagues in office. Desk decorations:Electronic desk toy can also be used as gift to your friend or family. The perpetual motion machine was suitable for home decorations, study room or office desk decorations accessory.Symbolize affection and are an excellent gift for lover. Ferris wheel model: This was perfect desk toy to impress your colleagues and customer, great for home ornament, study or office desk table decor accessories. Specifications: Material: Metal,ABS Size: approx.20x22.5cm/7.87x8.86in Power supply: USB Cable or 2xAAA Batteries（not included） Color: Golden Quantity: 1Pc Package Includes: 1xPerpetual Motion Ornament(other accessories in the picture was not included.) note: Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to difference between different monitors, the picture may not reflect the actual color of the item. Thanks!