【3-IN-1 LASER TAPE MEASURE】This laser tape measure combines 131ft/40m laser measurement with a 16ft/5m tape measure and a 32ft/10m 90° cross-laser line. This is a laser measuring tape, not just a tape measure. 【AUTOMATICALLY LOCKING TAPE】The tape automatically locks in place after being pulled out; simply press the gray button for automatic retraction. It's very convenient and safe, preventing hand injuries. Easily carry it anywhere with the wrist strap and belt clip. Robust, durable, and easy to carry. 【LED BACKLIT SCREEN & DATA STORAGE】A larger LED backlit screen helps you clearly read laser distance readings even in bright sunlight or dark environments; stores up to 20 measurements; the laser tape measure automatically shuts off to conserve power. 【MULTIFUNCTION MODE】Digital laser tape measure for area measurement, volume measurement, Pythagorean measurement, double Pythagorean measurement, and cross-laser line to meet all your needs. 【HIGH PRECISION】Laser measurement accuracy: +/- 2mm. Allows for continuous measurement; precise distance can be read within the effective range while moving. Class II laser output <1mW.