Feature: 【High Quality】：Made of high‑quality plastic and iron materials, it is safe and smooth to touch. 【Battery Powered】:Swing by hand, the electronic swing device will continue to rotate using battery power（not include）. 【Science Motion Toys】：Perpetual motion desk toy great for those who are passionate about science or demonstrating the laws of physics in a science classroom. Help your child explore important physics values. 【Perpetual Motion Desk Sculpture】：The simple and modern style is full of fun, and the electronic swing device is also a dynamic art decor on your home table or office desk.Can as decompression toy relieve tension. 【Gift Ideas】:The dolphin balance balls toy perfect gift for your friends,family,kids or children at birthday,Chrsitmas,graduation etc any occasion.Can also be an exquisite craft. Specification: Condition: 100% Brand New Item Type: Perpetual Motion Toy Material: Plastic + Iron Color: As shown in the picture Size: Approx. 11x11x19cm / 4.3x4.3x7.5in Weight: Approx.295g/10.4oz Battery: 4 x AA battery(Not included) Application: Great for those who are passionate about science or demonstrating the laws of physics in a science classroom. Help your child explore important physics values. Package List: 1 x Base(Battery Not Included) 1 x Bracket 2 x Accessories Note:1. Please allow 1‑2in error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.