Measuring Range: 0.05 - 50.00m; Accuracy: +/- 1.5mm (accurate up to 3 decimal places); 99 data memories, switchable units (meters, inches and feet); Optical lens: with two photosensitive holes, the measurement data is more accurate and more stable; With calibration and error report function Various Functions: Distance, area, volume measurement accurately, Pythagoras function (indirect measurement), continuous measurement function, add or subtract measurements, min and max value; Auto power off Mute function: Mute function to avoid noise; 4 lines of large screen LCD display with backlight; Robust shockproof housing with IP54 protection class (splash and dust protection) for a long service life, also suitable for wet or dirty environments Easy to use: By pressing a button, you can quickly check the height and length of the building, or the area and volume, suitable for DIY enthusiasts and professional CE / FDA / FCC / RoHS certification, widely used in construction sites and especially in apartments, buildings, factories and warehouses etc