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, easy to read the value at night. Wind speed in Beaucompatiblet 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. Quick response, external thermistor. Auto/manual power off. Temperature display in -40~60. Wind speed range: 0-30m/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 a 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 node Accuracy: +/- 5% Air temperature: Range: -10 - 45, 14 - 113F Resolution: 0.2, 0.36F Accuracy: 2, 3.6F Power supply: 1 x 3V battery CR2032 (not included) Thermometer: NTC thermometer Operating temperature: -10~45 (14~113F) Operating humidity: less than or equal to 90% RH Storage temperature: -40~60, -40~140F Power consumption current: about 3mA Item size: 105 x 40 x 18mm Item weight: 50g Package List: 1 * Digital Anemometer 1 * Lanyard 1 * User Manual