[High Accuracy] The fan uses 6 blades, which is suitable for various measurement purposes. Range/Resolution/Accuracy: Temperature (?): -20~60, 0.1, 1, 4s; humidity: 0~100% RH, 0.1% RH, 5% RH; wind chill (C): -40~ 10, 0.1, 2; Dew point (degrees Celsius): -40~60, 0.1, 2; Wind speed: 0.7~30m/s, 0.1m/s, 3% or 0.3m/s; Atmospheric pressure: 300~1100hPa , 0.1hPa, 1.0hPa; Altitude: -500~9000m, 1m; Illumination: 0~55000Lx, 1LX, 3% [8 in 1 Multifunctional Design] Our handheld anemometer integrates 8 measurement values of atmospheric pressure, humidity, illumination, altitude, temperature , wind chill, dew point and wind speed. A machine is versatile, convenient and efficient, bringing you more convenience of measurement [Superior material] Versatile anemometer is made of high quality ABS plastic, which has the characteristics of toughness, durability, strength wear resistance and drop resistance. It has good stability, wide range, reliable accuracy and high sensitivity. And can withstand certain impact during use and maintain a longer service life [Small and portable] The device is only the size of a palm and its size is only 122*48*212mm/4 ,79 * 1.89 * 8.33 inches. [Ergonomic Design] The body adopts non-slip design, which helps better grip and feel, will not fall or slip easily, and can provide more stable control during use