Pen and Mouse Ever/ Ipen Mouse Resolution: 800-1600 DPI Pen weighs 4 oz (total shipping wt. 1 pound) / 5 ft. USB cable included OS Compatibility: Windows 2000/XP/Vista/7/8, Mac OS, Linux OS Dimensions: 154mm(L) x 19mm (W) x18mm(H) Wireless version also available (i-penproII)