Logitech Wireless Wave Combo Mk550 With Keyboard and Laser Mouse (Certified Refurbished) This Certified Refurbished product is tested and certified to look and work like new. The refurbishing process includes functionality testing, basic cleaning, inspection, and repackaging. The product ships with all relevant accessories, a minimum 90- The Wave Combo MK550 includes the K350 model keyboard and M510 Mouse Powerful 2.4 GHz wireless connection with one tiny Unifying receiver that stays in your notebook Contoured laser mouse with rubber grips gives you smooth, precise cursor control. Wave-design ergonomic keyboard with cushioned palm rest for exceptional typing comfort. Virtually no battery changes ? up to three years of battery life for the keyboard and two years for the mouse* (* Keyboard and mouse battery life may vary based on user and computing conditions.)