Rosewill 3 Buttons 1 x Wheel PS/2 Wired Optical 800 dpi Mouse, Black (RM-C2P) Classic Mouse with the modern optical technology The simple and clean design comes with the advanced optical technology Get it out of the box and plug into the computer The RM-C2P is ready to use. There is no software required. Operating System Supported are Windows 95/98/2000/ME/XP/VISTA/7 , and NT