The 45118 is a waterproof pocket-sized thermo-anemometer for measuring air speed, temperature, and wind chill. It simultaneously displays air speed and temperature or wind chill on the LCD screen. Selectable averaging function with 5, 10, or 13-second intervals. The foldable protective housing can be extended to 9 inches (229 mm) for better reach. It is tripod mountable and features a data hold function with an automatic shut-off feature.