Item Name: LCD Backlight Display 0-30m/s Digital Anemometer Wind Speed Meter -10 ~ 45C. Battery CR2032 (not included) Measuring items Air velocity (Wind speed), Air temperature Operating humidity Less than 90%RH Operating temperature -10-45C Accuracy of Air temperature 2C Weight 52gRange of Air velocity 0~30m/s, 0~90km/h, 0~5860ft/min, 0~55knots, 0~65mph Accuracy of Air velocity 5% Current consumption Approx. 3mA Range of Air temperature -10-45C Thermometer NTC thermometer Resolution of Air velocity 0.1m/s, 0.2C Store temperature -40 ~+60 Anemometer:1.Air Velocity & Temperature Measurement 2.Max/Average/Current air velocity measurement 3./ Temperature unit selection 4.Five units of air velocity:M/s, Km/h, ft/min, Knots, mph5.Beaufort scale 6.Backlight display 7.Manual/Auto power shut off 8.Wind chill indication 9.Low battery indication. Package:1 Digital Anemometer *Please make