The Logitech K750 Wireless Solar-Powered Keyboard. Silver version.

Features:

• 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. System Requirements - Mac OS X 10.5 or later,USB port,Light source from sunlight and/or indoor lighting
• Tiny Logitech Unifying receiver: Stays in your laptop and connects additional compatible wireless devices. Not Bluetooth compatible