Night vision: HD LCD display with backlight, measurement data at a glance, easy to operate in dark environment. Measurement modes: 3-in-1 measurement, roll mode, tape measure 300M and laser measure 762M. The error is only 0.01cm. It can measure any surface you want. No longer limited to thin metal tape measures that can only measure straight surfaces. Roll mode: Roll mode allows you to measure curves and various objects by simply rolling it over the surface. You can measure any curved surface and irregularly shaped objects. Tape measure: flexible tape design, not easy to hurt hands, used in short distance measurements, such as flat and circular surfaces, body measurements. Laser measurement: precision laser head, 762cm long distance measurement, one-button detection, easy to operate.