Specification: 
 Buttons: 3 buttons with scroll wheel. 
 Tracking systems: Optical. 
 Max DPI: 2400DPI. 
 Ultra-precise Scroll Wheel. 
 Optical technology works on most surfaces. 
 Ergonomically designed, long-term use without fatigue. 
 Intelligent connectivity, no need to code, plug & play. 
 Switch Life: 5 million cycle. 
interface: USB

Compatible with for Windows XP, Vista,for Windows 7, ME, 2000 ,for Mac OS...or latest. 
 User for: The high-end players, gaming professional players