The 45118 is a waterproof, pocket-sized thermo-anemometer that measures air velocity, temperature, and wind chill. The LCD panel displays both air velocity and temperature or wind chill at the same time. The averaging function can be set to 5, 10, or 13 seconds. The foldable protective housing stretches up to 9 inches. (229mm) for increased reach. Tripod mountable. Data Hold and Auto Power Off features are available. Complete with battery and 43-inch. lanyard.