This anemometers is portable and useful which can measure wind speed and temperature, it can also show you the wind scale and indicate Windchill. LCD display with backlight makes it easy to read the value at night. Features: Measure wind speed and temperature. Large easy to read display LCD with backlight. Wind speed Beaufort wind scale bar graph. Cold wind indication. Data hold function. High precision pressure sensor. Quick response, external thermistor. Auto / manual power off. Temperature display in / F. Wind speed range: 0-30m/s Wind temperature range: -10 to 45 (14-113F) Current/max/average wind speed reading. Wind speed unit: m/s, km/h, ft/min, knots, mph. Powered by 3V CR2032 battery. Features: Airspeed: Range: 0 - 30m/s, 0 - 90km/h, 0 - 5860ft/min, 0 - 65mph, 0 - 55Knots Resolution: 0.1m/s, 0.3km/h, 19ft/min, 0.2mph, 0.2Knots Threshold: 0.1m/s, 0.3 km/h, 39ft/min, 0.2mph, 0.1Knots Accuracy: +/- 5% Air Temperature: Range: -10 to 45, 14 - 113F Resolution: 0.2, 0.36F Accuracy: 2, 3.6F Power supply: 1 * 3V CR2032 battery (not included) Thermometer: NTC thermometer Operating temperature: -10~45 (14~113F) Humidity: Less than or equal to 90% RH Storage temperature: -40~60, -40~140F Power consumption : About 3mA Item Size: 105 * 40 * 18mm Item Weight: 50g Package List: 1 * Digital Anemometer 1 * Lanyard 1 * User Manual