Laser distance meter Supports continuous measurement, surface volume measurement, Pythagorean measurement, addition and subtraction measurement, surface volume addition and subtraction, peaks and d functions. self-calibration. This laser distance measurement has the function of automatically calculating the area and volume. When using this laser measuring tool, no manual calculation is required, which improves work efficiency. Handheld laser distance meter Waterproof and dustproof, the dust will not affect the normal operation of the instrument and prevent water splashes from all directions from entering the instrument and causing damage. Easy to use, just one button and Only one measurement key are required for operation. Without climbing stairs, you can easily measure hard-to-reach areas, such as high ceilings. Made of aluminum alloy, small body and compact mode fits perfectly in your hand, provide a comfortable grip and offer you convenient use. m/in/ft, 3 kinds of units, switch at any time.