Wind Speed Specification:Range: 0 - 30 m/s, o - 90 km/h - 5860 ft/min, 0 - 65 mph, 0 - 55 knotsResolution: 0.1 m/s, 0.3 km/h, 19 ft/min, 0.2 mph, 0.2 knotsThresholds: 0.1 m/s, 0.3 km/h, 39 ft/min 0.2 mph, 0.1 knotsAccuracy: +/-5%Air Temperature Specification:Thermometer: NTC ThermometerRange: -10 C 45 C (between 14 F and 113 F) Storage Temperature: -40 C +60 C, -40 F 140 F Resolution: 0.2 C, 0.36 FAccuracy: 2 C, 3.6 F Current Consumption: Approx. 3 mA Operating Humidity: Less than or equal to 90% relative humidity Size: 49 x 21 x 112.1 mm Weight: 98 g Versatile: High-precision pressure sensor; Air velocity; Wind speed and temperature measurement; C/F temperature selection; Has 6 sensing blades to allow you to measure HVAC installations, CFM calculations, air ducts. Backlight Function: User can use your anemometer to work in a dark environment with the backlight function. Manual/auto shut-off is optional, and it will automatically turn off if it is not used for 5 minutes.MINI SIZE & PORTABLE DESIGN: Small and light enough to fit in your pocket, it comes with an orange protective sleeve for good protection, and the wrist strap allows you to hold it even in strong winds.VARIOUS APPLICATIONS: This anemometer provides quick measurements to analyze environmental conditions, ideal for industrial and household applications, such as measuring wind speed, fan speed, CPU computer fan temperature, but also for windsurfing, sailing, fishing, drone flying and mountaineering.