Anemometer 1.Air Velocity & Temperature Measurement; 2.Max/Average/Current air velocity measurement; 3.& 8451;/& 8457; Temperature unit selection; 4.Five units of air velocity:M/s, Km/h, ft/min, Knots, mph 5.Beaufort scale; 6.Backlight display; 7.Manual/Auto power shut off; 8.Wind chill indication; 9.Low battery indication. wind speed Measuring items & 65306;Air velocity (Wind speed), Air temperature Range of Air velocity & 65306;0~30m/s, 0~90km/h, 0~5860ft/min, 0~55knots, 0~65mph Accuracy of Air velocity & 65306;±5% Range of Air temperature & 65306;-10-45C (14-113F) Accuracy of Air temperature & 65306;±2C (3.6F) Resolution of Air velocity & 65306;0.1m/s, 0.2C Battery & 65306;CR2032 (not included) Thermometer & 65306;NTC thermometer Operating temperature & 65306;-10-45C (14-113F) Operating humidity & 65306;Less than 90%RH Store temperature & 65306;-40 ~+60 (-40 F~140F) Current consumption & 65306;Approx. 3mA Weight & 65306;52g