E-3lue EMS-622 Cobra 3 Levels 2000 DPI Blue LED Wired Optical Gaming Mice - Black High-definition optical tracking enables responsive cursor control for precise tracking and easy text selection Perfectly designed to fit snugly under your palm, the ergonomic shape gives gamers the most comfortable gaming experience ever LED scroll wheel and Blue pulsating lights,It is Eye-Catching and Dazzling Micro Switch provides lifespan of up to 5 million button clicks; Adjustable DPI Function: 600/1000/2000,you can change Mouse speed easily Product Compatibility: Windows 98/ 2000/ ME/ NT / XP/ win 7/ win 8 and iOS