Padless Mouse N-500FFeatures:V-Track mouse works anywhere without a pad. Screen Capture Tool consists of value-added functions, such as: Screen capture, TutorPen, 16-in-One, multimedia, Internet, 4-way wheel, etc. Best software for your every need. 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 System Requirements Windows 2000/XP/2003/Vista/Windows 7