Feature 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. Specifications Item Description Measuring items Air velocity (Wind speed), Air temperature Range of Air velocity 0~30m/s, 0~90km/h, 0~5860ft/min, 0~55knots, 0~65mph Accuracy of Air velocity ±5% Range of Air temperature -10-45C (14-113F) Accuracy of Air temperature ±2C (3.6F) Resolution of Air velocity 0.1m/s, 0.2C Battery CR2032 (not included) Thermometer NTC thermometer Operating temperature -10-45C (14-113F) Operating humidity Less than 90%RH Store temperature -40 ~+60 (-40 F~140F) Current consumption Approx. 3mA Weight 52g Dimension 40x18x105mm Packing 1 x hand-held anemometer 1 x Neck Strap/Lanyard 1 x Instruction Manual