Item Description Measuring items Air velocity (Wind speed), Air temperature Range of Air speed 030m/s, 090km/h, 05860ft/min, 055knots, 065mph Accuracy of Air speed ±5% Range of Temp -10-45 (14-113) Accuracy of Temp ±2 (3.6) Resolution of Air Speed 0.1m/s, 0.2 Battery CR2032 3.0V Thermometer NTC thermometer Operating temperature -10-45 (14-113 ) Operating humidity Less than 90%RH Store temperature -40 +60 (-40140) Current consumption Approx. 3mA Dimension 110*43*21mm