This Mini Thermo-Anemometer has a large dual display of air velocity and temperature or windchill. The meter has fold-up protective housing that extends to 9” for better reach. Data hold freezes the most recent display. The water-resistant housing floats and will withstand a drop of 6 feet. Replaceable metal wind vane (impeller). Measures ft/min., MPH, m/s, km/h, knots, and Beaufort force. Windspeed ranges from 60 ft/min minimum to 7830 ft/min maximum. Temperature range is 0 to 122°F (-18 to 50°C) with accuracy of ±1.8°F (±1.0°C). Comes with lithium battery and lanyard.