1、5 air speed unit conversion: m/s, ft/m, mph, km/h, Knots; 2 air temperature unit conversion: ℃/℉. 2、12 levels air speed indication - You don't need to make complicated conversion from value to wind scale. 3、With backlight for easy reading at darkness. 4、Overall air speed display at MIN/Max/AVG. 5、Lightweight with small volume, easy and convenient to use. Description: This digital anemometer is used to measure air speed and air temperature. LCD screen displays the measuring value at MIN/Max/AVG. It is widely used to measure air speed for 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. 12 levels air speed indication - You don't need to make complicated conversion from value to wind scale. 3. With backlight for easy reading at darkness. 4. Overall air speed display at MIN/Max/AVG. 5. Lightweight with small volume, easy and convenient to use. 6. Perfect tool for measuring air speed at home, office, car, air condition, exhaust fan, sailboat, navigation, etc. Specifications: Air Speed: Range: 0-45 m/s, 0-140 km/h, 0-8800 ft/min, 0-100 mph, 0-88 Knots Resolution: 0.1 m/s, 0.3 km/h, 19 ft/min, 0.2 mph, 0.2 Knots Threshold: 0.3m/s, 1 km/h, 60 ft/min, 0.7 mph, 0.6 Knots. Air Temperature: Range : 0-45℃, 32°F-113℉ Resolution: 0.2℃, 0.36℉ Accuracy: ±2℃, ±3.6℉ Operating Temperature: -10°C-50℃ / 14-122℉ Operating Humidity: 40% RH - 85% RH Storage Temperature: -20-60℃ / -4-140°℉ Input Current: 3mA Power Supply: 1 x 9V 6F22 Battery (NOT included) Product Size: 145*72*35mm / 5.85*2.83*1.38in Weight: Approx. 888g Package List: 1 x Digital Anemometer (Battery is NOT included) 1 x Manual 1 x Plastic Box 1 x Color Box Note: 1. Due to the difference between monitors and light effect, the pictures may not reflect  the actual color of the item. Please take the real one as standard. 2. Please allow slight error due to manual measurement. Thanks for your understanding.