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 or s, km/h, ft or min, knots or mph. With wind scale and windchill indication. Temperature unit is switchable: Celsius(anddeg C) or Fahrenheit(anddeg 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 Range: 0-30m or s 0-5860ft or min 0-55knots 0-90km/h 0-65mph Resolution: 0.1m or s 19ft or min 0.2knots 0.3km/h 0.2mph Temperature Range: -10-45anddeg C 14-113anddeg F Thermometer: NTC Thermometer Operating Temperature: -10-45anddeg C Relative Humidity: andlt =90 percent RH Power Supply: 2 x 1.5V AAA Batteries(not included) Item Size: 16 x 8 x 3.5cm or 6.30 x 3.15 x 1.38in Item Weight: 140g or 4.96oz Package Size: 18 x 11 x 5cm or 7.09 x 4.33 x 1.97in Package Weight: 265g or 9.36oz Package List: 1 x Anemometer 1 x Bag 1 x User Manual