V-Track 2.4G Wireless Mouse Features:Vertical light ensures perfect precision Short light path consumes lower power Incomparable adaptability on all surfaces Smoothly when using even on soft fabrics Tiny lens hole brings the best precision Dual-function key: Screen capture tool download & update Execute up to 5 chosen PC commands Screen capture tool consists of value-added functions, such as: Screen capture, TutorPen, 16-in-One, 4-way wheel, multi-link management, DPI, etc. Specifications:No lag. No cursor vibration 15 m operating range Size-freely capture any part of your screen 3 report rate 125-250-500 Hz 5 adjustable 800-1000-1200-1600-2000 DPI Package contents: Wireless mouse Multi-link receiver 1 AA alkaline batteries System Requirements Windows 2000/XP/2003 Vista/Windows 7