High precision measuring range: 0.02-60m; Accuracy: +/- 1.5 mm (accurate to 3rd decimal place); optical lens, the measurement data is more accurate and stable, with self-calibration function USB rechargeable, easy to use: Comes with a USB charging cable, so you can say goodbye to batteries. With the press of a button, you can quickly check the height and length of the building, or the area and volume, suitable for DIY enthusiasts and professionals, widely used on construction sites and especially in apartments, buildings, factories and warehouses, etc. Automatic mute function shutdown: Mute function to prevent noise. LCD display screen with backlight for long service life, suitable for example in humid or dirty environments. [various functions mini - portable]: distance measurement with bounce accuracy, area, function volume (indirect measurement), continuous measurement function, addition and subtraction measurement, minimum and maximum value. Small and light, it can be put in your pocket after use.