Air Flow Anemometer, Lifenergy Portable 8 in 1 Wind Speed Meter Multi-purpose Digital Anemometer Suitable for Measuring Temperature Humidity Measuring function: measuring the values of temperature, humidity, wind chill, dew point, wind speed, barometric pressure, altitude and illumination Data saving function: manually saving and automatically recording data Unit switching function; Adopting a matrix liquid-crystal display screen so that the display content is richer LCD backlighting display; Battery level display This product is a portable multi-functional anemometer. Because the measurement of altitude is influenced by barometric pressure and temperature, so the altitude values measured in different seasons and different climates are different; but in the same day and condition that barometric pressure and temperature slightly vary, the altitude reading is stable, so it can be used for measuring the altitude difference