Night vision: HD LCD backlight display, measurement data at a glance, easy to operate in dark environment. Measurement modes: 3 in 1 measurement, roll mode, tape measure of 300 m and laser measure of 762 m. The error is as small as 0.01 cm. It can measure any and all surfaces. No longer limited to flimsy metal tape measures that can only measure straight surfaces. Roll Mode: Roll Mode allows you to measure curves and different objects simply by rolling it across the surface, can measure any curved surface or irregularly shaped objects. Tape measure: flexible tape design, not easy to hurt hands, used in short distance measurement, such as a circular flat surface, body measurement. Laser measurement: precision laser head, 762cm long distance measurement, one key detection, simple operation.