This professional light pad is great for any crafter. It features an integrated ruler on the surface and dimmable omnidirectional LED to control intensity of brightness. This light pad will greatly improve the visibility of your project by providing more surface area and luminosity than competitors. Details: 18.3" x 13.3" overall size 16.1" x 11.4" illumination area Powered by micro USB - 5 voltsSlim lightweight design