This anemometer is portable and useful, it can measure wind speed and temperature, it can also show you wind scale and indicate wind chill. LCD display with backlight, it is easy to read the value at night. Wind speed in Beaufort wind scale bar graph. Wind chill indication.Measures wind speed and temperature. Large, easy-to-read LCD display with backlight. Wind chill indication. Data hold function. High precision pressure sensor. Fast response, external thermistor. Auto/manual power off. Temperature display in -40 ~ 60. Wind speed range: 0-30 m/s Wind temperature range: -10 ~ 45 (14 ~ 113 F)Reading current/max/average wind speed. Wind speed unit: m/s, km/h, ft/min, knots, mph. Powered by a 3V CR2032 battery. Specifications: Air speed: Range: 0 - 30 m/s, 0 - 90 km/h, 0 - 5,860 ft/min, 0 - 65 mph, 0 - 55 knots Resolution: 0.1 m/s, 0.3 km/h, 19 ft/min, 0.2 mph, 0.2 knots Threshold: 0.1 m/s, 0.3 km/h, 39 ft/min, 0.2 mph, 0.1 knot Accuracy: +/- 5% Air temperature: Range: -10 - 45, 14 - 113FResolution: 0.2, 0.36F Accuracy: 2, 3.6F Power supply: 1 x 3V CR2032 battery (not included) Thermometer: NTC Thermometer Operating Temperature: -10 ~ 45 (14 ~ 113 F) Operating humidity: less than or equal to 90% RH Storage temperature: -40~60, -40~140F Current consumption: about 3mA Item size: 105 x 40 x 18mm Item Weight: 50g Package List: 1 * Digital Anemometer 1 * Lanyard Note: The data is all measured manually, please allow 1-3cm error, due to the difference in light and display, there will be a certain color difference, the actual object received shall prevail.