Solar-powered keyboard: No battery hassles - any light source keeps your keyboard charged for at least three months in total darkness Only 1/3-inch thick: Ultra-thin design adds sleek style to your workspace Familiar Mac layout: All the keys you're used to, plus a Launchpad hot key, are exactly where you expect them Feel-good typing: Logitech-only concave key cap design for faster, quieter, more comfortable typing Tiny Logitech Unifying receiver: Stays in your laptop and connects additional compatible wireless devices