Anemometer, Hot Wire and Thermistor Sensing Method, Data Logging No, Humidity Sensing Yes, Velocity (FPM) 99 to 3,937 fpm, Velocity (MPS) 0.5 to 20 mps, Air Velocity Accuracy +/-3 Percent, Air Volume 0 to 99999 cfm, Temp. Range -4 Degrees to 140 Degrees F, Relative Humidity Range 0.1 Percent to 99.9 Percent, Probe Size 39 in, Cord Length 3 in (1m), Data Hold Yes, Auto Power Off Yes, Interface Digital, Includes Battery, Hard Case, Manual