ELECTRIC ANGLE SENSOR & BUILT-IN LI-ION BATTERY: Powered by a large capacity Li-ion battery, it can work up to 8,000 times when fully charged. There is no need to replace the battery frequently, making your work more efficient. Equipped with an electronic angle sensor, the laser rangefinder provides higher accuracy and faster angle measurements. MULTIPLE MEASURING MODES: This laser rangefinder provides angle, area, distance, volume and Pythagorean measurement modes. Equipped with measurement functions, continuous addition and subtraction, calibration, automatic area and volume calculation and 30-group data memory function, it is ideal for home, construction or industrial applications. HIGH ACCURACY AND SWITCHING: The distance measurement features long-range measurement with extreme accuracy and can measure distances up to 120m within 2mm. The tool can measure from front/middle/rear reference points, making it easy to measure in different scenarios. All measurements are displayed in real time and can be freely switched between M/In/Ft. LCD SETTING AND MUTE SETTING: A large backlit display provides users with better visibility in low-light working conditions. Automatic shutdown without operation after 150s. Volume control allows the user to freely adjust the volume for quiet areas such as libraries. (The laser measure is designed for indoor use. To use it outdoors, make sure it is not exposed to direct sunlight.) RUGGED AND DURABLE DESIGN: The laser distance measure is IP54 certified to withstand harsh working environments. It features small dimensions and a convenient pocket size so this laser device can fit in any pocket.