... special users a high accuracy, one person distance measuring and estimating tool to measure remote and difficult reaching ... addition, subtraction, Pythagoras, area and volume calculation make measuring fast and very reliable. The last 20 measurements are ... 0.06in) Smallest unit displayed1mm Measuring unitsm,in,ft Measuring unitsClass II 635 nm, < 1mW Measuring unitsIP 54 History measurement records20 ...