EXTECH AN500 Thermo Anemometer, 40 to 3940 fpm. More details: Anemometer, Hot Wire and Thermistor Sensing Method, Data Logging No, Humidity Sensing No, Velocity (FPM) 40 to 3940, Velocity (MPS) 0.2 to 20, Velocity (MPH) 0.5 to 45, Velocity (KPH) 0.7 to 75, Velocity (Knots) 0.4 to 40, Air Velocity Accuracy +/-3 Percent, Air Volume 0 to 999, 999 cfm, Temp. Range 32 Degrees to 140 Degrees F, Probe Size 0.50 In. dia., Cord Length 7 ft., Data Hold Yes, Auto Power Off Yes, Storage Capacity Store/Recall 36 Readings