Features: Wind speed, temperature and humidity measurementsWind speed unit selection: m / s, ft / min, knots, km / h, mph Beaufort scale, White backlight display C / F unit conversion. Maximum / Minimum / Average reading function Data hold function, cold index prompt function Low battery warning, Automatic shut-downCalibration functionDescriptions:Windspeed measurement range: 0.3 to 30 m / s, Accuracy: 5%Temperature measurement range: -10 to 50 (14 to 122oF),Accuracy: 1 degree CelsiusHumidity measurement range: 20% - -99%, Accuracy: 5%Resolution: 0.1 m / s, 1%Operating temperature: 0 to 50 (32 to 122oF)Operating humidity: 10 to 90% RHStorage temperature: -10 to 60 (14 to 140oF)Storage humidity: 10 to 75%Specifications:Material: plasticSize: 110 * 45 * 20mmColor: bluePackage included: 1 x 3-in-1 Anemometer(battery not include)