WM30 WeatherMeter
Highly accurate hygrometer; Current, maximum windspeed, average windspeed over 5, 10, or 13 seconds; Current temperature and windchill; Current relative humidity and dewpoint; Data lock feature; Replaceable plastic impeller won't corrode; Comes with lanyard; Threaded for tripod mount

• Accuracy: Windspeed: +/- 3%
  Temperature: +/-2 F
  Windchill: +/-2 F
  Relativity Humidity: +/- 3%
• Range: Wind: .5-89 MPH
  Temperature: 5 - 122 F
  Relative Humidity: 0 to 99%
• Optional Units: Windspeed: Knots, MPH, KPH, M/Sec, Ft/Min, Beaufort
  Temperature: Fahrenheit, Centigrade
• Operating Modes: Current windspeed - average over 2 seconds
  Average windspeed - 5, 10, 13 seconds
  Maximum windspeed - 2 second gust since power on
• Auto Shutdown: After 20 minutes
• Power: 400-Hr Lithium battery/CR2032 (included)
• Measures: 5.5" x 1.75" x .75" (closed)
• Weighs: 3.2 oz