It's a cool 4 inch globe that deflect the gravity and set to float and spin in the mid-air without any string attached. The floating globe use an oval magnetic field which could hold the globe and balance it with single bottom magnetic field. The Floating Globe makes a great gift for a friend or a loved one, or even yourself! Observe the Earth the way it was meant to be observed actually levitating in space and touching nothing but air! Amazing conversation piece. The size is pretty compact to fits all type of reading desks and the smooth chromed mirror magnetic base is really beautiful and suitable for desk decor stuff. Powered by a 12V A/C power supply.