By just holding it up to the wind the integrated impeller determines the current wind speed every second and displays it on the illuminated LC monitor either in mph, km/h, knots, m/s, ft/s, or Beaufort. the sapphire-mounted propeller reacts so quickly that wind speeds of just 2 mph (3km/h) are registered. Average values and peak average values can be displayed at the press of a button. The simultaneously displayed outdoor temperature is given in Centigrade and Fahrenheit, with measuring range from -24C to +60C. From the wind speed and the outdoors temperature the Windwatch PRO II can, when required, also determine wind chill -- the apparent temperature that is felt on exposed skin: Minox; $199; www.minox.com