1Automatical Backlight: The backlight of this instrument is automatically turned on and off. After the instrument presses any key, the backlight will continue to turn on for 15 seconds. After 15s, the instrument will automatically turn off the backlight if there is no operation to save power. 2Product Features: Continuous measurement, able to measure area, volume, Pythagorean, addition and subtraction, area volume addition and subtraction, maximum and minimum function, automatic calibration function, sound prompt. 3High Accuracy: Has high measuring accuracy, with 99 groups of storage. Short ranging time, intuitive distance display, low power consumption, etc. 4Simple Carrying: Designed to have a light weight and a compact size as well, the laser range finder is simple to carry. It is very suitable for outdoor measurement use. 5Usage Scenarios: Widely used in construction, interior decoration, road planning, warehouse logistics, housing acceptance and other industries.