Description Features wind speed temperature windchill relative humidity dew point heat index barometric pressure and upcoming storms Bar chart tracks air pressure over 16 hours Records maximum readings Twin button for multi-functions Alarm functions are built-in for storm warning feature Sealed precision thermistor & humidity sensor Water resistant and shock proof housing Replaceable lithium battery and impeller Pocket-knife design makes it convenient Low battery indication Technical Specification Modes Current Wind Speed, Maximum Wind Speed, and Average Wind Speed. Accuracy / – 3 % or / – last significant digit Range 1.1 to 20 M/S and 60 FM to 3937 FM and or 0.5 MPH to 44.7 MPH 0.4 to 38.8KNT and 1 BFT to 8 BFT and 0.8 KMH to 72 KMH Response Time 1 second Accuracy 33.8 °F ( / – 1 ºC) Range 5 °F to 122 °F (-15 ºC to 50 ºC) Modes Atmospheric Pressure Scales hPa (millibar) or inches of mercury (inHg) Accuracy / – 3 hPa (at 14 °F to 140 °F (-10 ºC to 60 ºC)) Range 400 hPa to 1100 hPa (11.8 inHg to 32.5 inHg) Response Time 15 minutes History 16 Hours recall trends Modes Wind Chill, Dew Point, and Heat Index Accuracy Dew Point 35.6 °F ( / – 2 ºC) and Windchill 30.2 °F ( / – 1 ºC) and Heat Index 26.6 °F ( / – 3 ºC) Operating Temperature -4 °F to 149 °F (-20 ºC to 65 ºC)
