EXC NTE ACCURACY - 2 water levels provide more accurate measurement compared to a single water level; accuracy: 1/16 inch; measuring range up to 164 ft to meet your regular measurement needs; press and hold the U button for 2 seconds to switch units freely between M/In/Ft BEST STABLE OPERATION - Practical and compact design offers comfortable handling; included durable carrying case protects the laser measure from dust; lightweight and easy to carry and store; large LCD display with backlight for improved readability in low-light conditions FUNCTION SETTINGS - Automatic area and volume calculation; 30 group data storage; manual data deletion; 6 unit options; calibration; addition and subtraction; auto power-off after 150 seconds of inactivity; max and min value measurement SIMPLE AND FAST MEASUREMENT - Multiple measurement modes including distance, volume, area, continuous measurement, and Pythagoras measurement ensure fast operation; ideal for home, construction, and industrial use, especially in large spaces such as rooms, apartments, buildings, real estate, factories, warehouses, etc. PACKAGE CONTENTS - HD50 164 ft laser measuring device; AAA batteries; user manual; portable case; wrist strap; packaging box; 24 months service