Feature: 100% brand new and high quality Buttons: 7 buttons with scroll wheel Tracking systems: Optical The Max DPI: 2400DPI Adjustable DPI Switch: 600 -1000 -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 Size: 130x86x39mm Weight: about 115g Compatible with Windows XP, Vista, Windows 7, ME, 2000 and Mac OS...or latest User for: The high-end players, gaming professional playersPackage Content: 1PC Adjustable 2400DPI Optical Wireless Gaming Game Mouse For Laptop PC(without retail package)