Feature:1. Battery power, swing by hand, the electronic swing device will continue to rotate using battery power.2. 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.3. The perfect gift for your friends or family, it can also be an exquisite craft.4. Made of high‑quality plastic and iron materials, it is safe and smooth to touch.5. The simple and modern style is full of fun, and the electronic swing device is also a dynamic art on your table.Spec:Condition: 100% Brand NewItem Type: Perpetual Motion ToyMaterial: Plastic + IronColor: As shown in the pictureSize: Approx. 11x11x19cm / 4.3x4.3x7.5in Weight: Approx.295g/10.4ozBattery: 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 Bracket2 x AccessoriesNote: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.