Special shielded unit for environments with heavy electronic interference. New unit built for cancelled order - 36 x 48 Calcomp Drawing Board VI Digitizer Tablet - .010 Accuracy with Corded Pointing Device, Mounting Brackets, Drivers, Manual, and all Necessary Cables. Native USB Connection. Serial Kit Required if Connecting to a Computer Serial Port. Works with AutoCAD, QuikRuler Module, or WinTab Compatible Digitizer Software and a Computer. Footprint 45 in. x 60 in. Weight 30 lbs. Compatible with Windows 95/98/XP/Vista/7. Cordless options not available for sheilded unit.