Features: 1.Made of high quality material, safe and smooth to touch. 2.Swing it by hands and it will use the battery power to keep on revolving . 3.It requires 4 AA batteries and will swing until the battery runs out or you stop it. 4.Simple and modern style with much fun, it is also a piece of kinetic art on your desk. 5.Perfect gift for your friends or family, a good craft ornament. specification: Made of high quality material, safe and smooth to touch. Swing it by hands and it will use the battery power to keep on revolving . It requires 4 AA batteries and will swing until the battery runs out or you stop it. Simple and modern style with much fun, it is also a piece of kinetic art on your desk. Perfect gift for your friends or family, a good craft ornament. : Model: K503 Material: Iron & Plastic Weight: Approx. 300g/10.6oz Battery: 4* AA Batteries (NOT included) Color: As pictures shown Process: Electroplating Package List: 1 x Perpetual Motion Model Decor 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-YJL official store