Calculated Industries 4065-AB1 Construction Master Pro Advanced Construction Math Calculator<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Financial calculator designed for construction professionals</li><li>Performs common building formulas; area and volume calculations; works in various units， English/metric</li><li>Plastic back， aluminum front， soft rubbed buttons</li><li>Includes 2 3-volt lithium batteries， user guide， quick reference guide， protective slide cover</li><li>5.6 by 3 by 1/2 inches; display dimensions 0.86 by 2-1/2 inches; 3.2 ounces; 1-year warranty</li></ul></div><img src="http://ecx.images-amazon.com/images/I/51RJMTMVHWL.jpg" noproxy>