LED BacklightsThe rainbow colors and adjustable brightness create a cool ambiance and make the keyboard mouse combo full of energy. Plus, the illuminated characters make it a breeze to type even in the dark.NOTE: The keyboard and mouse share ONE USB receiver. Quiet and Comfortable TypingSoft membrane keys for making typing quiet and smooth. With the tilt legs, you can find the perfect typing angle for maximum comfort. The wireless mouse feels just as clicky but makes 90% less noise. No more worrying about disturbing others while working from home.