Great for designers, woodworkers, craftsmen, technicians, ect. Calculates directly in feet, inches, fractions, yards, meters, centimeters, millimeters, including square or cubic formats of each. Converts to and from all dimensional formats instantly. Instant solutions for circumference, circle area and arc lengths. 1 button solves postholes, columns, pillars, arches and much more. Weight-per-volume key allows you to find weight of material (i.e., tons per cubic yard, kilograms to pounds, ect.). Custom set fractions. Estimate material costs. Paperless tape allows you to review last 20 entries. Includes battery (model No. CR-2032).