Built In IR Thermometer Conventional Angle Vane Infrared Thermistor Sensing Method Data Logging No Humidity Sensing No Velocity (FPM) 80 to 5900 fpm Velocity (MPS) 0.4 to 30 mps Velocity (MPH) 0.9 - 67 mph Velocity (KPH) 1.4 to 108 kph Velocity (Knots) 0.8 to 58.0 knots Air Velocity Accuracy +/-(3 Percentreading + 40 ft/m) Air Volume 0 to 999 999 cfm Temp Range 32 to 122 Degrees F Relative Humidity Range Not Applicable Cord Length 3.9 ft Data Hold Yes Auto Power Off Yes