ACCURATE MEASUREMENT: Reliable measurement range from 0.04 to 50m / 165ft. Measurement accuracy: 2mm. Change four units with one button: m / ft / in / ft + in; Thanks to the 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. MULTIFUNCTION: Measure distance, area, volume accurately , Pythagorean function (indirect measurement); Continuous measurement function + Auto sum function. Maximum and minimum values at the touch 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 BACKLIGHT LCD & MUTE SWITCH: Super large backlight display provides users with better visibility. mute function suppress the beep sound in quiet environments (libraries, class); 20 sets of data memory recall function for verification and calculation; Automatic shutdown after no operation at 180s to save power. PORTABLE NON-SLIP: IP54 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. It can be easily put in a gift bag