Brightly backlit keys with illuminated characters for easy typing?even in the dark * PerfectStroke key system makes every keystroke more comfortable, fluid and quiet * No batteries needed?recharge quickly with the included universal micro-USB cable * Powerful 2.4 GHz wireless connection with one tiny Unifying receiver that stays in your computer * Works with Windows-based PCs With laser-etched, backlit keys you can see easily in any light, a sleek look, and comfortable, fluid typing, the logitech wireless illuminated keyboard k800 delivers a brilliant typing experience-day or night.