1、Stable Oscillation: This perpetual motion machine sits on a stable table and will happily oscillate when powered on or when the battery is not depleted, until the energy supply stops. 2、Classic Tabletop Ornament: This is a classic tabletop accessory that's simple, stylish, fun, beautiful and elegant, it's art in motion. 3、Stress Relief: Use this cool perpetual motion desk toy for occasional stress relief and relaxation when you keep it on your home desk. 4、Provides Fun: This classic tabletop toy offers you a lot of fun and is a fun device that not only demonstrates pendulum motion but also helps to show the laws of momentum and conservation of energy. 5、Widely Applicable: This perpetual motion ornament is suitable for various places, and can be used as ornaments in homes, office desks, shopping malls, entertainment places and other places. 1 x Ornament2 x Bracket1 x Base1 x USB Cable Item Type: Perpetual Motion MachineMaterial: Plastic Frame, Wrought IronGross Weight: 310g / 10.9ozProduct Principle: make it swing with external force by hand and then use the energy transformed by the battery to continue to swing until the battery is no powerBattery: the product does not contain batteries, you need to bring four AA batteries Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-Minnanxin