Measures wind speed, temperature and wind chill accurately and reliably. Displays current, max and average wind speed (m/s, km/h, mph, feet/s, knots) and beaufort scale. Displays current temperature and current/minimum wind chill temperatures in Celsius or Fahrenheit. Clock function with alarm. Includes race timer and chronograph functions. Waterproof and includes backlight. Wind vane also acts as a compass when horizontal.