Logitech K750 Solar-Powered USB Receiver 104-Key Desktop PC Wireless Keyboard (Certified Refurbished) This Certified Refurbished product is tested & certified by Logitech work like-new. The product includes all original accessories, and is backed by a 90 day warranty. Wireless Solar-Powered (two solar panels on keyboard) Streamline design 104-key layout Advanced 2.4GHz wireless connectivity Works with Windows-based laptop and desktop PCs