This anemometer is portable and useful which can measure wind speed and temperature, it can also show you wind scale and indicate windchill. LCD display with backlight, it is easy to read the value at night. Features: Measure wind speed and temperature. Large easy to read LCD screen with backlight. Wind speed in Beaufort large scale wind bar graph. Cold wind indication. The data works. Precision high pressure sensor. Fast 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 a 3V CR2032 battery. Features: Air speed: Beach: 0 - 30 m/s, 0 - 90 kmh, 0 - 5860ft/min, 0 - 65 mph, 0 - 55Knots Resolution: 0.1m/s, 0.3kmh, 19ft/min, 0.2mph, 0.2Knots Threshold: 0.1m/s, 0.3kmh, 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 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 Consumption: About 3mA Item Size: 105*40*18mm Item Weight: 50 g Package List: 1 * Digital Anemometer 1 * Lanyard 1 * User Manual