HIGH ACCURACY - Using laser precision technology, accuracy up to ±0.3-50M with a measuring accuracy of ±1.5mm, the measuring distance extends to 50m; Switchable between M/In/Ft for free adjustment. With 2 unique bubble levels that allow more accurate measurement compared to a bubble. LCD BACKLIGHT & MUTE SETTING - The large backlit display gives you better visibility in dark areas. With the mute function, you can turn the beep on or off as you like. Suitable for use in libraries, classrooms and other quiet places. MULTIPLE MEASURING FUNCTIONS - area, distance, length, volume, continuous measurement, Pythagorean method - three points; Addition and subtraction; Low battery indicator; 99 groups of data storage; Delete data manually; Auto power off after 150 seconds without operation to save electricity. DURABLE AND PRACTICAL - IP54 waterproof and dustproof function provides maximum protection for the laser distance measurer. Portable size and hard rubber body ensure a good grip; With the