3-in-1 MEASUREMENT: This laser tape measure combines 131ft/40m laser measure with 16ft/5m tape measure and 32ft/10m 90cross laser line . TAPE LOCKED AUTOMATICALLY: 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 DISPLAY AND DATA STORAGE screen Larger LED backlight display helps you read laser ranging numbers clearly even in direct sunlight or harsh environment. dark; Store up to 20 measurements, laser tape measure auto power off to save power. MULTIFUNCTION MODEDigital laser tape measure for area measurement, volume measurement, area measurement Pythagoras, Pythagoras double measurement and cross laser line to satisfy all your needs. HIGH PRECISIONLaser measurement accuracy: +/- 2mmIt is available to do continuous measurement, distance accurate can be read within the effective range while moving. Class II laser output 1mW output power.