Capable of measuring both air velocity and temperature in either Fahrenheit or Celsius, the HHF92 handheld meter measures flow in several different units, such as ft/.min., mph, knots, meters/s, and km/hr. It is also capable of giving min/max/avg. air velocity readings. Other key features of the HHF92 battery-powered digital airflow/temperature meter include a dual LCD display and auto power shutoff after 20 minutes.The tester comes in the Anemometer Kit, which, in addition to the meter, also includes a hard carrying case, a 9V battery, and an operator's manual. The unit has a battery life up to 100 hours. The display size is 37 x 42 mm. And the handheld device measures only 7.2" x 3.0" x 1.8" with the diameter of the fan being only 70 mm.