Features: 1. Exquisite workmanship: high-quality materials, wear-resistant, not easy to rust, durable, and can be used for a long time. 2. Rotating art: If you are bored, flip this magnetic self-rotating perpetual spinning top, it can keep spinning for hours or even days. If you want to take a break while studying or working with a gyroscope, you will feel relaxed. 3. Convenient installation: pry open the bottom cover at the opening, install a AA battery, close the bottom cover, twist the small top on the base to start, relying on the electromagnetic principle, the small top will always rotate. 4. Decompression toys: The light and compact shape is easy to carry and store. You can use it as a physical education model, office equipment, stress reliever, or as a beautiful gift and desk decoration. 5. The perfect gift: creative physics teaching equipment models, interesting children39;s toys and home decorations. It is a great gift for children, friends, colleagues and students. Notice: 1.Actual color may be slightly different from the image due to different monitor and light effect 2.Please allow 1-3cm deviation due to manual measurement Description: Material: ABS Size: Base: 8.8*3cm Small spinning top: 2.2*1.9cm Package List: 1 base without battery 1 x spinning top