Reading the wind in all directions thanks to aerial at 3 buckets. Boats integrated into the case for better shock resistance. Waterproof and insubmersible. Automatic trigger backlight in case of low light. Automatic stop after 60 seconds of immobilization of the buckets for an optimal saving of the battery. Ergonomic and compact design. Optional wall or flat support for easy storage or measurement with tripod. Functions • Wind speed: scale: 1.0 to 40 m/s. Units: knots, m/s, km/h, MPH in digital form. Beaufort in graphic form. Maximum speed average speed of 5.10, 20 or 40 selectable seconds. Precision: 4 %. Resolution: 0.1 up to 9.9 1 above 10. • Ambient and wind air temperature (Windchill): Ladder: -20 to +60 ° C. Units: ° C or ° F. Precision: 1 ° C. Resolution: 1 ° C.