1,Support continuous measurement, area volume measurement, Pythagorean measurement, addition and subtraction measurement, area volume addition and subtraction, peaks, and self-calibration functions. 2,This laser distance measurement has the function of automatically calculating area and volume. When using this laser measurement tool, manual calculation is not required, which improves work efficiency. 3, and dustproof, dust will not affect the normal operation of the instrument, and prevent water splashing from all directions from entering the instrument and causing damage. 4,, only one button and one measurement key are required for operation. Without climbing stairs, you can easily measure hard-to-reach areas, such as high ceilings. 5,Made of aluminium alloy material, small body and compact mode fits in hand ly, provides comfortable grip and gives you convenient operation. m/in/ft, 3 kinds of units, switch at any time. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.