Calculated Industries Scale Master Pro XE linear digital plan measures. For construction pros and estimators looking for the fastest, most accurate, and versatile way to do "take offs" from prints and plans. Scale Master Pro XE blueprint measuring tool features 91 built-in scales to cover virtually any application: 50 Imperial (Feet-Inch) units and 41 Metric. Includes 10 custom scales that can be set by the user to accommodate out-of-scale prints and plans that have been faxed, enlarged, reduced, or are unscaled. Instantly calculates regular shaped areas and volumes. Dual LCD displays make it easy to read. New ergonomic design makes it comfortable to hold. Features accumulating memory, subtract key, push-button counter and auto-count mode. PC Interface capability built-in. (Requires optional PC Interface). Includes user guide, lithium batteries, and storage case. 1-year warranty. Scale Master Pro XE linear digital plan measures are made in the USA.