[Precise Wind Meter] Anemometers measure wind speed in 5 units: m/s, km/h, ft/min, knots, mph, with 12 beaufort scales, and detect air temperature (14F and 113F). [Multi-Function] High precision pressure sensor; Air speed; measurement of wind speed and temperature; Temperature selection C / F; With 6 sensing vanes for you to measure HVAC installation, CFM calculation, duct vents. [Backlight function] User can work in dark environment with your anemometer via function of backlight. Manual/auto power off optional, it would power off automatically if you don't use it for 5 minutes. [Mini Size and Portable Design] Compact and lightweight, you can keep it in pocket , comes with an orange protective case which provides good protection and a wrist strap ensures you can hold it even in strong winds. [Various Applications] This anemometer provides quick measurement for analyzing environmental conditions , ideal for industrial and household applications, such as measuring wind speed, fan, CPU computer fan temperature, and also used for windsurfing, sailing, fishing, flying drone and Mountaineering. Product Description Multi-function digital anemometer This anemometer provides a quick measurement for analyzing environmental conditions. Ideal for industrial and household applications, such as measuring wind speed, air blower, CPU computer fan temperature, and also for windsurfing, sailing, fishing, boating, etc. drone flight and mountaineering. Functions: 1. Airflow velocity and temperature measurement 2. Max/average/current air speed measurement 3. Select C/F temperature unit 4. Five air speed units: M/s, Km/h, ft/min, Knots, Mph 5. Indication of wind chill (when temperature is below 0C) 6. Wind speed in Beaufort wind scale bar graph 7. Manual/automatic shutdown (without any operation in 14 minutes and the device will automatically shut down) 8. Low Battery Indicator Specification: Air Speed Specification: Range: 0-30 M/S, 0-5860 FT/ MIN, 0-55 knots, 0-90 KM/h, 0-65Mph Resolution: 0.1 m/s, 19 ft/min, 0.2 knots, 0.3 km/h, 0.2 mph Threshold: 0.1 m/s, 39 ft/min, 0.1 knots, 0.3 km/h, 0.2 mph, Accuracy : +/- 5%. Air temperature specification: Thermometer: NTC thermometer. Range: Between -10C and 45C / 14F and 113F Resolution: 0.2C, 0.36F. Accuracy: 2C, 3.6 F Various Applications: This anemometer temperature gauge is suitable for home, weather enthusiast or professional to accurately measure air velocity and temperature of air. For windsurfing, kite flying, sailing, surfing, fishing, shooting. To measure speed at home wind, fan, CPU computer fan temperature. For industries, such as power industry, steel industry, petrification industry, manufacturing industry, etc. How to install the battery? 1.Remove the rubber case. 2.Open the battery cover with a screwdriver. 3.Install the battery.