Anemometer Rotating Vane and 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 Percent Temp Range 0 Degrees to 122 Degrees F Relative Humidity Range 10 Percent to 95 Percent Data Hold Yes Auto Power Off Yes Includes CR2032 Battery Instructions Lanyard