This anemometer is portable and useful which can measuring wind speed and temperature it also can show you wind scale and indicate windchill. LCD display with backlight it is easy to read value at night. Features: This portable anemometer is a practical measuring meter which can measure wind speed and temperature. Wind speed unit is switchable: m/s km/h ft/min knots or mph. With wind scale and windchill indication. Temperature unit is switchable: Celsius(°C) or Fahrenheit(°F). Maximum minimum and average value measurement function. LCD display with backlight easy for reading. Come with a string convenient to hold and carry. Specifications: Wind Speed : 0-30m/s; 0-5860ft/min; 0-55knots; 0-90km/h; 0-65mph Resolution: 0.1m/s; 19ft/min; 0.2knots; 0.3km/h; 0.2mph Temperature : -10~45°C; 14~113°F Thermometer: NTC Thermometer Operating Temperature: -10~45°C Relative Humidity: <=90%RH Power Supply: 2 * 1.5V AAA Batteries(not included) Item Size: 16 * 8 * 3.5cm / 6.30 * 3.15 * 1.38in Item Weight: 140g / 4.96oz Package Size: 18 * 11 * 5cm / 7.09 * 4.33 * 1.97in Package Weight: 265g / 9.36oz Package List: 1 * Anemometer 1 * Bag 1 * User Manual