This anemometer is portable and useful which can measuring wind speed and temperature, it also can show you wind scale and indicate windchill. LCD display with backlight, it is easy to read value at night. Features: Measure wind speed and temperature. High precision pressure sensor. Quick response, external thermistor. Large easy-to-read LCD display with backlight. Data hold function. Temperature display in /. Wind speed in Beaufort wind scale bar graph. Wind chill indication. Wind speed range: 0-30m/s. Wind temperature range: -10 - 45 (14-113). Wind speed unit: m/s, Km/h, ft/min, Knots, mph. Current/max/average wind speed reading. Powered by a 3V CR2032 battery. Auto/manual power off. Specifications: Air Velocity: Range: 0 - 30m/s, 0 - 90km/h, 0 - 5860ft/min, 0 - 65mph, 0 - 55Knots Resolution: 0.1m/s, 0.3km/h, 19ft/min, 0.2mph, 0.2Knots Threshold: 0.1m/s, 0.3km/h, 39ft/min, 0.2mph, 0.1Knots Accuracy: +/- 5% Air Temperature: Range: -10 - 45, 14 - 113 Resolution: 0.2, 0.36 Accuracy: 2, 3.6 Power Supply: 1 * 3V CR2032 battery (Not Included) Thermometer: NTC Thermometer Operating Temperature: -10~45 (14~113) Operating Humidity: less than or equal to 90%RH Storage Temperature: -40~60, -40~140 Current Consumption: About 3mA Item Size: 107 * 43 * 20mm / 4.21 * 1.69 * 0.79in Item Weight: 61g / 2.15oz Package Size: 11.5 * 6.5 * 3.5cm / 4.53 * 2.56 * 1.38in Package Weight: 83g / 2.92oz Package List: 1 * Digital Anemometer 1 * Lanyard 1 * User Manual (English)