Description Color: Black Buttons: 7 buttons with scroll wheel. Tracking systems: Optical. The Max DPI: 3200DPI. LED Light color : 5 light color gradual change (Red Light /Green Light /Blue Light /White Light) 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. Size: 127(L) x 85(W) x 37(H)mm. Compatible with Windows XP, Vista, Windows 7, ME, 2000 and Mac OS...or latest. User for: The high-end players, gaming professional players Please note that slight color difference should be acceptable due to the light and screen. Package Content: 1 x 7 Button USB Wired Expert Gaming Mouse