Hewlett-packard HP Optical Five-Button Mouse HP Optical Five-Button Mouse with Light-Up Scroll Wheel • Optical sensor provides accurate cursor movement and superior performance • Windows® 98SE, 2000, Me and XP compatible • Manufacturer’s one-year warranty Designer shape for use with left or right hand. Personalized Microsoft Office® functions with five programmable buttons. 800 dpi optical sensor. USB connectivity. Scroll Wheel Lights Up Red Black