LBell Laser Meter, (40M/131ft/1575in) with Accurate Area Volum Pythagorean Distance Measurement Professional laser distance meter, laser distance 0.05 to 40m (0.16 to 131ft), high accuracy 1.5mm (0.06in). Installed with two spirit levels, quick and accurate measurement of distance, area and volume. Also can make use of Pythagorean proposition get the indirect measurement of distance or length Consecutive Automatic Measurement with 20 data storage, Easy addition / subtraction of measurement Switchable units among meter ( m ), inch ( in ), feet ( ft ). Large LCD display with backlight and multi-line display, the data comparison is clear Power supply is two AAA batteries, auto or manual laser light / backlight / power off function, safe and power saving