1High Accuracy with Electronic Level Advanced laser measuring device with built-in electronic angular sensor, it will real-time display the data when measuring; Compared to Bubble Levels, it can be more intuitive and easier to find the horizontal direct 2Multiple Measurement Modes Three measuring reference Rear/Front/End piece allows you to project Single Distance/Area/Volume Measurement, Continuous Measurement, Auto Level/Height Measurement, Measurement by Pythagoras; Optional side measure button enab 3Durable and Portable DesignCovered soft rubber is for more shock-resistant and wear-resistant; IP54 waterproof level and dust-proof function protect the laser distance measure to the maximum extent; Wrist strap and portable pouch let you hold the meter 4LCD Backlight and Unit ChangeFour-line of data LCD display and high definition backlight enable us to compare data more clearly and conveniently; Free adjustment unit among M/In/Ft/Ft+In for your needs 5Efficient and Reliable ServiceBroad use for home, construction and industries, especially in large areas such as rooms, apartments, buildings, real estates, factories, warehouses etc; Our package included Professional Laser distance meter 131