Up your productivity level with the HP Desktop C2500 keyboard and mouse set. Designed with spill-resistant construction for full protection from accidental spills and adjustable legs for improved wrist posture. Comfortable keyboard The built-in number pad simplifies calculations and data entry, while the full-size keyboard ensures keys are positioned where your fingers expect them to be. Quiet key strokes take the clattering out of typing Quality mouse Constructed with 3 buttons to promote productivity and high-resolution optical sensor (1200 dpi) that works on most surfaces. Its contoured shape keeps your hand comfortable and the rubber side grips feel great to the touch. System requirements: Microsoft Windows® XP and Vista/7