The AN100 CFM/CMM Thermo-Anemometer can display both air flow and air velocity, as well as ambient temperature. The meter's internal memory stores the easily selected area dimensions (ft² or m²) for the next power on. Additional characteristics include a 20-point average for air flow and 3% velocity accuracy thanks to low friction 2.83 in. D (72mm) ball bearing vane wheel with 3.9ft (120cm) wire. Comes with a 9V battery, protective rubber holster, and case.