Features: 3-in-1 Multifunction Anemometer: with stable performance and reliable quality, the professional digital anemometer not only can measure wind speed, but also can measure temperature & humidity. High Accuracy Measurement: wind speed meter can accurately measure wind speed in 6 units: m/s, km/h, mil/h, ft/m ft/s, knots. Range 0.7-30m/s, 2.5-108km/h, 1.5-67.1mil/h, 137-5900ft/m, 2.3-98.5ft/s, 1.3-58.3knots. More Features of Anemometer: data hold function, can hold the reading; MAX/MIN/AVG function, it will show the highest/lowest/average reading on the display; manual / auto power OFF optional; low battery indication. Handheld LCD Screen Meter: this wind speed gauge equipped a LCD screen with backlight, can reading better and clearer both under sun or in dark. Compact and lightweight, you can keep it in pocket. Wide Applications: it is widely used in wind energy, meteorology, industry, agriculture, hydrology, highways, airports, etc. Specifications: Material: ABS Air Velocity Unit: m/s, km/h, mil/h, ft/m, ft/s, knots Air Velocity Range: 0.7-30m/s, 2.5-108km/h, 1.5-67.1mil/h, 137-5900ft/m, 2.3-98.5ft/s, 1.3-58.3knots Temperature Range: -20~60(-4~140) Humidity Range: 0~99.9%RH Display: LCD with backlight, MAX display 9999 Air Velocity: 0.70-30.00m/s Sampling Rate: One reading per 0.5 sec. Sensor: Air velocity/flow sensor-angled vane arms with bearing Max/Min/Avg: Minimum, maximum, average measurement Data Hold: Freeze reading Operating Environment: Temp. 0-40C, humidity