This anemometer with flexible precision vane is ideal for HVAC applications in residential, commercial and industrial air conditioning systems. It offers numerous functions - use it to check air velocity FPM (feet per minute), air volume (flow) CFM (Cubic feet per minute) plus the remote vane allows greater measurement location flexibility. Simply input the area of airflow measurement to gain accurate air velocity results. It can measure airflow source for a continuous moving average for up to 2 hours and determine minimum, maximum and average readings from a single point air source. Data can be output to PC via optional PC-software and RS232 cable. Includes a hard carrying case and batteries.