72 built-in scales for more versatility, 39 imperial (feet-inch) and 33 metric; 6 custom scales, 3 each for imperial and metric units, lets you "roll" or define any scale from plans that have been reduced, enlarged, faxed or otherwise out of scale; calculate area, volume, height, length, width for imperial and metric units; manual count while rolling for studs, piers, outlets or other items; subtract function to remove the last distance measured; includes 2 long-life 3-volt batteries, hard cover protective case, English user guide, multi-language available on corporate website; ideal for contractors, landscapers, electricians, estimators and anyone needing fast, accurate takeoffs from plans and blueprints.