Wireless Solar keyboard

The logitech wireless solar key-board K750 measures just 0.33 inches thick, and is designed to re-charge when it is exposed to sun light. Once the keyboard is charged, it can operate for up to three months in total darkness, and it is designed to charge even in areas where there is little light. It is available for Rs3,600 from logitech.com(source:-Sci-tech-mumbaimirror.com)