iGamer - Weyes 2800DPI 9D 7 Buttons Optical USB Professional Ergonomic Gaming Mouse Hand Orientation: Both Hands Maximum dpi: 2800DPI Windows Vista: Works with Windows Vista Operating System Supported: Windows 2000/ XP/ Server 2003/ Vista; Mac OS 9.X + System Requirement: USB port Version: Standard Package Contents: 1 x Gaming Mouse Parts: 1 Year Warranty