Air Velocity and amp; Temperature Measurement.Max/Average/Current Air Velocity Measurement - LCD Backlight - Weight: 1.83-Ounce.Wind Speed In MPH, Ft/Min, Km/H, M/Sec, or Knots (Accuracy: /- 5-Percent) - Low Battery Indicator - Dimensions: 1.57'' x 0.707'' x 4.127''.Wind Speed In Beaufort Wind Scale with Bar Graph - Auto Power OFF.Wind Chill Display - Neckband Accessory Included The PMA85 is a digital anemometer and thermometer from Pyle. Perfect for sailors, surfers, hang-gliders, kite-fliers — any activity where keeping track of the wind speed and direction is important. The PMA85 can display the maximum, average, and current air velocity. This meter is small, portable, and measures wind speed in ft/min, m/sec, MPH, km/hr, knots, and using the Beaufort wind scale. It also has a built-in thermometer which can measure the temperature in both Fahrenheit and Celsius units. Neckband accessory included. LCD backlight means you can use this meter in the dark without issues. A 3V lithium battery is included.