[ACCURATE and EFFICIENT RESULTS] This technique effectively reduces the error caused by excessive temperature; Dual spirit levels help you get a horizontal direction to get more accurate measurements. [MULTIPLE MEASUREMENT FEATURES] The laser measurement tool can measure area, distance, volume, continuous measurement, the Pythagorean method-3 points; Addition and subtraction mode helps you get calculation results more efficiently. [LCD BACKLIGHT and MUTE FUNCTION] Laser distance measurement measures distance up to 30m, freely switch units to In /M/Ft/Ft+In; Large backlit display gives you better visibility in dark areas, low battery indication; Mute function allows you to turn on or off the measurement beep as you like. [EASY TO USE] You can get accurate results in 0.5s, finish your work efficiently; 20 groups of data memory for reviewing measurement record, manually deleting data. Professional laser distance meter for home use/decoration, large areas such as buildings, real estate, factories, warehouses, apartments, etc.