Item Type: Electronic Perpetual Motion Toy Material: Plastic Size after combination: Approx. 25 x 23 x 11cm / 9.8 x 9.1 x 4.3in Battery type: AA batteries Battery type: 4pcs AA, 1.5v (shipped without batteries) Package List 1 x Base 5 x Accessories 13D Orbit: The rotating orbiter is like a 3D ball, moving smoothly and swaying from side to side, a beautiful scenery on the desk. You can also learn the charm of science in this model. 2Perpetual Motion: Rotating orbiter has an elegant and innovative design of motion, bringing more fun to your office. rotating orbiter adds scientific charm and mystery to your office or room. 3Simple Twist: Rotating orbiter has a simple twist on the upper part of the base that creates a moving sphere. You or your children can learn science from this model, to stimulate children's interest in science. 4Easy to Install: The rotating orbiter is easy to install and take apart. Rotating orbiter is a great gift for friends and family. Even people who have never touched it can easily install the model. 5Perfect Decoration: The rotating orbiter is perfect for your office or outer space themed room. Rotating orbiter will captivate you and anyone else watching it for hours.