The LED bulb providing a professional lighting for makeup, it is soft and not dazzling, so your eyes not be hurt by the light, the sufficient light makes you not worry about the color difference when make up. 9 levels brightness adjustable, you can adjust the brightness to meed your demands. You can adjust the string length between each bulb to match your mirror size. With USB line, the product can charge your phone. You can charge your phone while makeup.