CFM/CMM Thermo- Anemometer with built-in non-contact IR Thermometer measures remote surface temperatures to 500"F (260"C) with 8:1 distance to spot ratio and Laser Pointer Simultaneous display of Air Flow or Air Velocity plus Ambient Temperature Easy to set Area dimensions (ft" or m") are stored in the meter's internal memory for the next power on Resolution of 0.01m/sec 20 point average for Air Flow Large (9999 count) LCD Backlit Display 3% velocity accuracy via low friction 2.83"D (72mm) ball bearing vane wheel on 3.9ft (120cm) cable Complete with vane sensor with 3.9ft (120cm) cable, 9V battery, and protective rubber holster Specifications Weight 1.6lbs (700g) Dimensions 7 x 2.9 x 1.3in (178 x 74 x 33mm) Air Velocity 0.40 to 30.00 m/s Air Temperature 14 to 140?F (-10 to 60?C) Airflow 0 to 999,999 CMM (m3 /min) Infrared Temperature 58 to -4?F (-50 to -20?C)