Features High Accuracy: Able to test the maximum value, current value as well as calculating the average value, the air flow tester tool has higher accuracy for working. Smart Testing: This anemometer can be used to test wind speed, wind temperature, wind force and so on, meanwhile the handheld wind speed meter is easy to operate. Clear Display: Equipped with a large LCD screen, the wind speed sensor with backlight is very clear to read, thus greatly improving the overall work efficiency. Broad Utility: Can be used for air conditioning wind speed testing, environmental wind speed testing, fan wind speed testing, micro wind speed testing and so on. Practical Use: Designed to have 5 units of m/s, km/h, ft/min, knots, mph, also has other functions such as auto power off, low power reminding and more. Specification: Item Type: Anemometer Material: ABS Battery Model: 1 x button battery, shipped with matching battery. Battery capacity: 150mah Thermometer: NTC Thermometer Working Temperature: -10℃~45℃, that is, 14℉~113℉. Working Humidity: Relative Humidity Less Than 90% Storage Temperature: -40℃~60℃, that is, -40℉~140℉.  Package List: 1 x Anemometer 1 x Lanyard 1 x Protective Cover 1 x Battery 1 x Accessory 2 x User Manual Package List 1 x Anemometer 1 x Lanyard 1 x Protective Cover 1 x Battery 1 x Accessory 2 x User Manual