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 (14 F and 113F). Multi-Function: High precision pressure sensor; Air speed; measurement of wind speed and temperature; Temperature selection C / F; With 6 sensitive vanes for you to measure HVAC installation, CFM calculation, duct vents. Backlight Function: User can work in dark environment with your anemometer via backlight function. 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 your pocket, comes with a orange protective case that 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 home applications , such as measuring wind speed, fan, CPU computer fan temperature, and also used for windsurfing, sailing, fishing, drone flight and Mountaineering. This Anemometer provides quick measurement for analyzing environmental conditions. Ideal for industrial and home applications, such as measuring wind speed, air blower, ventilator temperature CPU computer bearers, and also for windsurfing, sailing, fishing, drone flying and mountaineering. Digital Anemometer Functions: 1. Airflow velocity and temperature measurement 2. Max/Average/Current airspeed measurement 3. Selection of temperature unit C/F 4. Five units of air speed: M/s, Km/h, ft/min, Knots, Mph 5. Indication of wind chill (when the temperature is below 0C) 6. Manual/automatic shutdown (without any operation in 14 minutes and the device will shut down automatically) 7. Low Battery Indicator Digital Anemometer Specification: Air Velocity 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, 3.6F Digital Anemometer Various Applications: This anemometer temperature gauge is suitable for home, weather enthusiast or professional to accurately measure the speed of the air. air and air temperature. For windsurfing, kite flying, sailing, surfing, fishing, shooting. For measuring wind speed, wind speed at home fan, computer CPU fans 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. Package included: 1* Anemometer 1 * Battery (CR2032) 1 * Lanyard