CORN 3 Buttons 1 x Wheel USB Wired Optical 1200 dpi High-performance Gaming Mouse with Avago A5050 Optical Engine and Blue LED Lights Maximum dpi: 1200 dpi Hand Orientation: Both Hands Operating System Supported: Windows XP (SP2 or higher) or Windows Vista or Windows 7 (32-bit or 64-bit) System Requirement: USB port Package Contents: 1 x USB Mouse Parts: Free replacement Labor: Free replacement