Our constellations are provided with a 5 1/2" base along with a USB cable for use with any USB source, but you can also choose our larger 13" base which comes with a 12" x 12" acrlic insert image for a truly stunning piece of art. Color selection, brightness and display mode (solid color, auto fade from one color to the next) are managed through the push button on the front of the base, with the ability to choose 7 different colors and three display modes.