15 air speed unit conversion: m/s, ft/m, mph, km/h, Knots; 2 air temperature unit conversion: /. 2Measured by 6-leaf wind wheel with low friction bearing design, the meter has high sensitivity and stable data. 3LCD backlight screen displays the measuring results clearly even in dark. 4Come with soft rubber holster, which adopts non-slip design to protect the meter better. 5Ideal tool for air speed measurement of home, office, car, air condition, exhaust fan, sailboat, navigation, etc.Features: 1.5 air speed unit conversion: m/s, ft/m, mph, km/h, Knots; 2 air temperature unit conversion: /. 2.Measured by 6-leaf wind wheel with low friction bearing design, the meter has high sensitivity and stable data. 3.LCD backlight screen displays the measuring results clearly even in dark. 4.Come with soft rubber holster, which adopts non-slip design to protect the meter better. 5.Ideal tool for air speed measurement of home, office, car, air condition, exhaust fan, sailboat, navigation, etc. Specification: Model: GM818 Air Speed Specification: Range: 0-30 m/s, 0-90 km/h, 0-5860 ft/min, 0-65 mph, 0-55 KnotsResolution: 0.1 m/s, 0.3 km/h, 19 ft/min, 0.2 mph, 0.2 KnotsThreshold: 0.1m/s, 0.3 km/h, 39 ft/min, 0.2 mph, 0.1 KnotsAccuracy: 5%.Air Temperature Specification: Thermometer: NTC Thermometer.Range: -10~45C (14~13) Resolution: 0.2, 0.36Accuracy: 2, 3.6Current Consumption: About 3mA Storage Temperature: