1.BUILT-IN LI-ION BATTERY & ELECTRIC ANGULAR SENSOR: Powered by a large-capacity Li-ion battery, laser measure offers remarkable runtime for all-day jobs and can work up to 8000 times when fully charged. There is no need to replace the battery frequently making your work more efficiently. Equipped with electronic angular sensor, laser distance meter delivers higher accuracy and faster angle measurements compared to bubble level meters.2.MULTIPLE MEASUREMENT MODES: This laser distance measure delivers angle, area, distance, volume, Pythagorean measurement modes. Featuring continuous measurement, addition and subtraction, calibration, automatic calculation of area and &volume and 30 groups data memory function, it is ideal for home and construction or industries applications.3.HIGH ACCURACY & UNIT SWITCHABLE: distance measure features long-range measuring with extreme accuracy and can measures distances up to 393-feet within 1/16-inch. 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 switchable among M/In/Ft freely.4.BACKLIT LCD AND MUTE SETTING: Large backlight screen provides users with a better visibility in low-light or no-light working conditions. Automatic shutdown without operation 150s.Mute setting allows users to adjust the volume freely which is suitable for using in library, classroom and other quiet places.5.DURABLE ROBUST DESIGN: r laser distance measure is IP54 rated to withstand tough working environments. It features small dimensions and a handy pocket-size design so this laser measure can fit in any pocket. 1/4" inch threaded mount enables it to be attached to tripod or other tools for use. Package Contents: 1 x Laser Distance Meter, 1 x User Manual, 1 x Hand Strap, 1 x USB cable