No Computer Required, Quantities are displayed on the screen of the Measuring Module which Displays Lengths, Counts, Areas, Perimeters, Take-outs, etc. The QuikRuler also Measures Curved lengths and Areas by Tracing. All Scales supported or Set Scale from Drawing. - 30 x 36 GTCO Roll-Up II and The QuikRuler Measuring Module - Includes Everything Required to Measure Blueprints in One Package. Footprint 35 in. x 44 in. Weight 6 lbs. Compatible with Windows 95/98/XP/Vista/7.