With a large ice-blue backlit display, the LV110 vane thermo-anemometer is easy to read in light or dark environments. According to the manufacturer, the rugged, compact device is ideal for many applications including laboratory, clean room, air balancing, and more. It measures 0-8,000 feet per minute (fpm) air velocity and -4° to 176°F. Features include a 4-inch (100 mm) fixed probe; maximum, minimum, and hold buttons; a measurement unit selection of meters per second or fpm; and shockproof housing. One 9V battery is included with the vane thermo-anemometer.