Feature: 100% brand new and high quality. Buttons: 6 buttons with scroll wheel. Tracking systems: Optical. The Max DPI: 2000DPI. Adjustable DPI Switch: 800-1600-2000DPI Ultra-precise Scroll Wheel. Optical technology works on most surfaces. Ergonomically designed、 long-term use without fatigue. Switch Life: 5 million cycle. Size: 125(L) x 80(W) x 35(H)mm. Weight: about 110g. Compatible with Windows XP、 Vista、 Windows 7、 ME、 2000 and Mac OS...or latest. User for: The high-end players、 gaming professional players.Package Content: 1 PC Gaming Mouse (without retail package) 1 x USB receiver