Item Type: Dolphin Perpetual Motion Material: Plastic, Metal Product Size After Combination: Approx. 16x11x19cm / 6.3x4.3x7.5in Batteries: Base: 4 x AA (Shipped Without Batteries) Package List 1 x Base 2 x Mounting Pendant 1 x Metal Swing Piece Please allow some error due to manual measurement. 1UNLEASH YOUR IMAGINATION: Perpetual pendulum decor is built for creators, makers, thinkers and anyone who wants to unleash their inner creativity and imagination. 2FULL OF FUTURISTIC TECHNOLOGY: Stay focused, relieve stress, or just relax during work time or brainstorming sessions. The control magnetic system makes it rock and roll with a futuristic tech feel. 3EASY TO INSTALL AND DISASSEMBLE: Dolphin perpetual motion toy is easy to install and disassemble, so even people who have never touched it before can easily install the model. 4GREAT GIFT: Dolphin perpetual motion is a great gift for friends and family and will surprise your guests and friends. Can be used as home office desk decoration and teaching model. 5SCOPE OF APPLICATION: Perpetual swing toy is widely used in advertising display, children learning education, teaching novelty toys, home, office, desktop decoration, business gifts, art technology GIF.