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 makes it easy to read the value at night. Wind speed in Beaufort wind scale bar graph. Indication of wind chill. 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℃ (14~113F) Reading current/max/average wind speed. Wind speed unit: m/s, km/h, ft/min, knots, mph. Powered by one 3V CR2032 battery. Specifications: Air Velocity: 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 knot 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 - 113F Resolution: 0.2℃, 0.36F Accuracy: ±2℃, ±3.6F Power: 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 18 mm Item weight: 50g Package List: 1 * Digital Anemometer 1 * Lanyard 1 * User Manual