ACCURATE MEASUREMENTSReliable measurement range from 0.04 to 50m / 165ft. Measurement accuracy: 2mm. Switch four units with one button: m / ft / in / ft + in; Thanks to the Le advanced 2-bubble leveling, for precise vertical and horizontal alignment of the laser. use 2 reference points to select the front or back edge of the device as the starting point of the measurement, the measurement data is more accurate. MULTIFUNCTIONMeasuring distance, area, volume with precision, Pythagorean function (indirect measurement); Continuous measurement function + Auto sum function. Maximum and minimum values at the push of a button. Ideal for home, construction and industry, especially in large areas such as apartments, buildings, real estate, factories, warehouses, construction and industries. LARGE LCD BACKLIGHT & MUTE SWITCHSuper large backlight screen provides users with better visibility. mute function suppress the beep sound in quiet environments (libraries, class); 20 sets of memory data callback function for verification and calculation. NON-SLIP PORTABLEIP54 dustproof and waterproof ensure maximum protection in harsh working conditions. Non-slip design: Wrapped with soft rubber good grip, wrist strap provided to prevent slipping. He can be easily put in a gift bag