【3 IN 1 Laser Tape Measure】This laser tape measure combines 131ft/40m laser measure with 16ft/5m tape measure and 32ft/10m 90°cross laser line . not precise enough. This is a laser tape measure【AUTOMATICALLY LOCKED TAPE】The tape will automatically lock the position after being pulled out, just press the gray button to rebound automatically. It is very convenient and safe, does not hurt your hands. And you can easily carry anywhere with the hand strap and belt clip. Sturdy and durable, easy to carry. 【LED BACKLIGHT SCREEN AND DATA STORAGE】Larger LED backlight screen helps you read laser ranging numbers clearly even in bright sunlight or dark environment; Store up to 20 measurements, laser tape measure auto off to save power. 【MULTIFUNCTION MODE】Digital laser tape measure for area measurement, volume measurement, Pythagoras measurement, double Pythagorean measurement and the cross laser line to satisfy all your needs. 【HIGH PRECISION】 Laser measurement precision: +/-2mm，It is available to do continuous measurement, accurate distance can be read within the effective range while moving. Class II laser output <1mW output power.