RioRand Professional LED Optical 5500 DPI 7 Button USB Wired Gaming Gamer Mouse Mice Adjustable DPI Switch Function 5500DPI/3200DPI/2400 DPI /1600 DPI /1000 DPI For Pro Game Notebook PC Laptop Computer Powered by RioRand Advanced Technology Compatible with Windows XP, Vista, Windows 7, ME, 2000 and Mac OS...or latest. User for: The high-end players, gaming professional players. The Max DPI: 5500DPI.