The REED 8906 is a professional rotating-vane thermo-anemometer that simultaneously measures air velocity, air temperature, and calculated air volume (CFM) on a dual backlit LCD. Its low-friction vane and up to 2-hour continuous averaging make it well suited for HVAC/R balancing and airflow diagnostics, with velocity readings from 80 to 6900 fpm and about +/-2% accuracy. Min/Max/Average and data-hold functions round out the feature set for field technicians.