This anemometer is portable and useful which can measure wind speed and temperature, also it can show you 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 LCD display with backlight. Wind speed in Beaufort wind bar graph on a large scale. Cold wind indication. Data hold function. Precision high pressure sensor. Quick response, external thermistor. Auto / manual stop power. 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 a 3V CR2032 battery. Features : Air speed: Beach : 0 - 30m/s, 0 - 90kmh, 0 - 5860ft/min, 0 - 65mph, 0 - 55Knots 0.1m/s, 0.3kmh, 19ft/min, 0.2mph, 0.2Knots Threshold: 0.1m/s, 0.3km/h, 39ft/min, 0.2mph, 0.1Knots Accuracy: +/- 5% Air temperature: Beach : -10 to 45, 14 - 113F Resolution: 0.2, 0.36F Accuracy: 2 , 3.6f 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 About 3mA Point Size: 105*40*18mm Item Weight: Bag of 50 g List: 1 * Digital Anemometer 1 * Lanyard 1 * User Manual