Zelotes Professional Up to 5500 DPI 7 Button 500Hz LED Optical USB Wired Gaming Mouse Mice Support Surface Mouse Grip Style: 1000DPI / 1600DPI/ 2400DPI / 3200DPI / 5500DPI Maximum dpi: 5500 DPI Hand Orientation: Both Hands Operating System Supported: Windows 2000/ XP/ Server 2003/ Vista; Mac OS 9.X + System Requirement: USB port Package Contents: 1 x Game Mice Option: Wired