Digital Laser Distance Measurer, LM50 50m Digital Laser Meter, Length/Area/Volume/Pythagorean Theorem with LCD Backlight, IP54 (50m) High Precision: Utilizing laser precision technology, accuracy is up to ±0.3-50M with a measurement accuracy of ±1.5mm, measuring distance extends up to 50m; Convertible between M/In/Ft for free adjustment. Features 2 unique spirit levels enabling more precise measurement compared to a single level. LCD Backlight and Mute Adjustment: The large backlit screen provides better visibility in dark areas. The mute function allows you to turn the audible signal on or off as needed. Suitable for use in libraries, classrooms, and other quiet places. Multiple Measurement Functions: Area, distance, length, volume, continuous measurement, Pythagorean method – three points; addition and subtraction; low battery indicator; 99 data storage groups; manual data deletion; automatic shutdown after 150 seconds of non-use to conserve power. Durable and Practical: IP54 waterproof and dustproof functionality provides maximum protection for the laser distance measurer. Portable size and a hard rubber body ensure a good grip; with the wrist strap, you can hold the meter steadily and carry it easily.