4.5" Silver and Black Constellations MOVA Globe with Square Base in Black Handmade with acrylic shells and non-toxic fluids Powered by ambient light and the earth's magnetic field No batteries or wires required to operate your MOVA Globe. All you need is light! MOVA Globe rotates silently to reflect the steady motion of Earth. Rotates on a variety of acrylic, crystal, and wood bases, even on the palm of your hand!