Flips Open and Extends to 11 in Rotating Vane Thermistor Sensing Method Data Logging No Humidity Sensing Yes Velocity (FPM) 216 to 3936 fpm Velocity (MPS) 1.1 to 20 mps Velocity (MPH) 2.5 to 44.7 mph Velocity (KPH) 4 to 72 kph Velocity (Knots) 2.1 to 38.9 knots Air Velocity Accuracy +/-(3 Percentreading + 40 ft/m) Air Volume Not Applicable Temp Range 35 to 122 Degrees F Relative Humidity Range Not Applicable Cord Length Not Applicable Data Hold Yes Auto Power Off Yes