Portable digital anemometer anemometer wind speed measuring instrument The WT816A anemometer is a waterproof and dustproof device used to measure wind speed and air temperature. An anemometer, also known as a wind vane, is a device used to measure the movement of gases. Our device is a vane-type anemometer, so named for its structure—more precisely, a seven-spoke rotor that rotates with the airflow. The rotor's rotational speed is recorded by a counter, determining the wind speed. The data collected by the device is displayed in a user-friendly format on an LCD screen. With its rich functionality, simple operation, and clear measurement results, this anemometer is ideal for a variety of measurement needs. Functions: Measures wind speed and temperature, measures maximum, average, and current wind speed, selects temperature in degrees Celsius or Fahrenheit, Speed ​​measurement units: m/s, km/h, ft/min, knots, mph Beaufort wind scale: bft (0 to 12 degrees), backlit, easy-to-read display, manual or automatic device shutoff, low-sense temperature and battery status indicator, IP67 rated for complete dust and water resistance up to 1 meter for up to 30 minutes Technical Specifications: A. Wind Speed: Range: 0-30 m/s / 0-5860 ft/min / 0-55 knots / 0-90 km/h / 0-65 mph Resolution: 0.1 (m/s) / 19 (ft/min) / 0.2 (knots) / 0.3 (km/h) / 0.2 (mph) Threshold: 0.7 (m/s) / 137 Speed ​​(ft/min) / 1.4 knots / 2.5 km/h / 1.6 mph Accuracy: ±5% B. Temperature: Range: -10°C to +45°C / 14°F to 113°F Resolution: 0.2°C / 0.3°F Accuracy: ±2°C / ±3.6°F C. Other: Battery: CR2032 3.0V (included) Thermometer: NTC thermometer Operating Temperature: -10°C to +45°C (14°F to 113°F) Operating Humidity: Less than 90% RH Storage Temperature: -40°C to +60°C (-40°F to 140°F) Power Consumption: Approximately 3mA Weight: 85g (including battery) Dimensions: 47 x 21 x 126 mm Package Contents: WT816A Anemometer User Manual CR 2032 Battery Lanyard Silicone Case (Attached to the Device)