A variety of optional units can be selected from five units, press and hold the MODE button for 3 seconds to enter the setting mode, the wind speed unit is flashing, press the SET button to select the wind speed unit SET, and press the MODE button to confirm. A variety of measurement modes 1. Timely measurement, current wind speed measurement 2. Maximum measurement, this mode only displays the maximum wind speed value 3. Average measurement, the time mode displays the average wind speed value at the measurement time, the six-blade design with low friction bearing design, the measurement is more sensitive and the data is more accurate. High-definition backlight HD-backlit LCD display, night work applications. Soft plastic shell with soft rubber bumper, side anti-skid design can better protect the instrument. A lanyard is installed to wear the lanyard to prevent loss or fall.