Product Description Anemometer with IR Temperature, Rotating Vane Sensing Method, Data Logging No, Humidity Sensing No, Velocity (FPM) 80 to 5900, Velocity (MPS) 0.4 to 30, Velocity (MPH) 0.9 to 67, Velocity (KPH) 1.4 to 108, Velocity (Knots) 0.8 to 58.3, Air Velocity Accuracy +/-3 Percent, Air Volume 0 to 999,999 cfm, Temp. Range -58 Degrees to 500 Degrees F (IR), 14 Degrees to 140 Degrees F (Air), Probe Size 2.83 in dia, Cord Length 3.9 ft, Data Hold Yes, Auto Power Off Yes From the Manufacturer Built-in non-contact IR Thermometer measures remote surface temperatures to 500-Degrees F (260-Degrees C) with 8:1 distance to spot ratio and Laser Pointer. CFM/CMM Thermo-Anemometer can simultaneously display of Air Flow or Air Velocity plus Ambient Temperature. Easy to set Area dimensions (cm2) are stored in the meter's internal memory for the next power on. Additional features include: 20 point average for Air Flow and 3-percent velocity accuracy via low friction 2.83-InchD (72mm) ball bearing vane wheel on 3.9-Foot (120cm) cable. Comes complete with 9V battery, protective rubber holster, and case.