The Extech 45118 is a pocket-sized waterproof thermo-anemometer for air velocity, temperature and wind chill measurements. Simultaneous display of air velocity and temperature or wind chill on the LCD screen. Selectable averaging function with 5, 10 or 13 second intervals. Hinged protective housing with a length of 22.9 cm (9 inches) for better reach. The thermometer can be mounted with a tripod. With data hold and automatic switch-off function. The scope of delivery includes a battery and a 1.1 m long lanyard.