Buttons:6 buttons with scroll wheel.Tracking systems: Optical.The Max DPI: 2400DPI.Ajustable DPI Switch: 800/1200/1600/2400DPI.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.Built-weight iron， feel comfortable， mobile and stability.Switch Life: 5 million cycle.Model:KN-004Compatible with Windows XP， Vista， Windows 7， ME， 2000 and Mac OS...or latest.User for: The high-end players， gaming professional players.