Check the listing for details. Extech AN100 CFM/CMM Thermo Anemometer Airflow Velocity Temperature Meter Tool. Condition: Used. Listed at 107.99 USD. Brand: Extech Model: AN100 CFM/CMM Thermo-Anemometer handheld meter Function: Measures air flow or air velocity plus ambient or probe temperature with a large digital display Controls: Front panel buttons for AREA, UNITS, HOLD, AVG, NEXT, MAX/MIN, backlight, and °C/°F selection Included components: Handheld AN100 meter, wired Extech vane probe, soft zippered carrying case with shoulder strap, original retail box Power: 9V battery compartment as shown Additional details: Designed for airflow measurements in CFM or CMM, memory stores multiple area values and supports 20-point averaging for airflow or air velocity Keywords: HVAC testing, airflow measurement, anemometer, temperature meter, CFM CMM, Extech AN100 instrument