describe Measuring range: 0.05 - 50.00 m;Accuracy: +/- 1.5 mm (accuracy 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 stable;with calibration and error reporting functions Multiple functions: precise measurement of distance, area, volume, Pythagorean function (indirect measurement), continuous measurement function, addition and subtraction measurement, minimum and maximum values;automatic shutdown Silent function: silent function to avoid noise;4-line large-screen LCD display with backlight;robust shockproof housing with IP54 protection rating (splash and dust resistant), long service life, also suitable for damp or dirty environments. Easy to use: Just press a button, you can quickly check the height and length of the building, or the area and volume, suitable for DIY enthusiasts, widely used on construction sites, especially apartments, buildings, factories and warehouses, etc.. Battery powered (battery not included) Size: 11.2*5*2.5CM Package includes: 1 * rangefinder