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 swinging. 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 swinging. 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. : Material: Iron & Plastic Weight: 250g/8.8oz Battery: 4* AA Batteries (NOT included) Color: As pictures shown Process: Electroplating Model: #D301, #D303, #D305 (Optional) Package List: 1 x Perpetual Motion Model Decor