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Get instant linear, rectangular area and volume take-offs; use it like a pen - just roll and measure
Convert between scales and dimensions
Six user-set custom scales. Calibrates to any plan and then stores that scale for future use. Perfect for scaling faxed or out-of-scale plans.
Calculate rectangular areas/volumes (LxWxH). Roll and enter length of room, then width and instantly calculate square footage.
72 built-in scales; 39 U.S. (feet-inch) and 33 metric.
Multiple dimensional units for versatility; select the measurement units you use: decimal feet, feet-inches, decimal inches, yards, millimeters, meters, kilometers - including square and cubic formats
Subtract and Counter feature lets you subtract if you roll too far. Also lets you count items (e.g., studs, outlets, etc.) and accumulate in memory.
Easy-to-read dual display shows your measurement in feet/inches or metric
 
Includes:
Hard cover protective case
Complete User's Guide
Two long-life CR2032 lithium batteries
One-year warranty
 
Tech Specs:
Size: 7.3" x 1.9" x 0.6" (186 x 47 x 15 mm)
Wheel Resolution: 0.025" (0.635 mm)
Wheel Composition: Celcon Polymer
Weight (product only with battery): 2.1 oz. (60 g)
Power: Two 3-volt lithium (CR-2032) batteries (included)
Display Type: LCD segment; 7-digit main display, 3-digit count, 5-digit scale display, with annunciator legends
Display Dimensions: Upper: 0.62 x 1.22" (15.8 x 31 mm)
Lower: 0.79 x 1.22" (20 x 31 mm)
Accuracy: Mechanical accuracy 99.8%. Users should allow for 2-4% variance for start/stop points and rolling surfaces."
-Calculated Industries