Logitech MK750 Wireless Solar Keyboard & Marathon Mouse Combo (Certified Refurbished) This Certified Refurbished product is factory refurbished, shows limited or no wear, and includes all original accessories plus a 90-day warranty Solar-powered keyboard: No battery hassles. Any light source keeps the keyboard charged for at least three months, even in total darkness High-performance laser mouse: Get accurate cursor control, hyper-fast scrolling and up to three years of battery life Unifying wireless receiver: One tiny USB receiver wirelessly connects both the keyboard and mouse to your computer Comfortable combo: Concave key caps, whisper quiet keys and sculpted mouse for feel-good typing and mouse control