The OEM Logitech Solar Wireless Keyboard LOG920002912 is a wireless, thin, solar-powered keyboard that charges itself whenever there is light, even indoors. It stays charged for at least three months in total darkness, eliminating the need for batteries. This keyboard features a concave key-cap design with PVC-free construction and offers USB and 2.4GHz connectivity for virtually no delays or dropouts. It is compatible with Windows XP, Vista, and 7.