Logitech Wireless Wave Combo Mk550 - Keyboard and Laser Mouse (Certified Refurbished) This Certified Refurbished product is factory refurbished, shows limited or no wear, and includes all original accessories plus a 90-day warranty The Wave Combo MK550 combo consists of the K350 model keyboard and M510 Mouse Powerful 2.4 GHz wireless connection with one tiny Unifying receiver that stays in your notebook Wave-design ergonomic keyboard with cushioned palm rest for exceptional typing comfort Contoured laser mouse with rubber grips gives you smooth, precise cursor control