The 45168CP is a Pocket Thermo-Anemometer which measures Windspeed in ft/min, MPH, m/s, km/h, Knots and Beaufort Force with 10 second averaging function. Additional measurements include: Temperature, Relative Humidity, Dew Point, Wet Bulb, and Windchill. The built-in compass provides wind direction/ 360° readings and has an easy-to-use calibration procedure for improved accuracy. Its water resistant housing floats and drop-tested to 6 feet. Featuring a replaceable non-corrosive plastic wind vane (impeller) and a tripod mount for hands free use. Complete with a CR2032 battery and a lanyard.