Fast Response Probe. Air Flow Volume. Instant / Avg / 2/3 Vmax Flow Measurement. Velocity m/s, ft/min, knots, km/hr, mph. Temperature & Humidity measurement. Calculate Dew point temperature, Wet bulb temperature, Wind chill temperature, Humidex temperature and Heat index temperature. Data hold & Maximum / Minimum function Manual data memory and read function (10 x 99 sets). LCD triple display. Telescoping probe. USB interface. Learn More