Description Specifications: Dimensions: 25*22*10.5 cm Material: ABS plastic Power supply: USB battery dual-purpose, 4 AA batteries (not included) Packing list: 1 x Physical Pendulum This dynamic sculpture has a ball that rotates around a ring, like Like a rotating Ferris wheel, it is a perfect spinning art on the desktop. Beautifully decorated, this is the perfect table spoon to impress your colleagues and clients. Great for home decor, study room or desk decorative accessory. This is a stylish, innovative and perfect gift for those who are passionate about science. With play toys, you can experience mechanical fun that will keep you and others mesmerized for hours. The easy-to-use balance ball will continue to run until you stop or turn it off.