The wind meter measures wind direction and speed. It works with ultrasound, a state-of-the-art technology for extremely precise measurements. You can set parameters for messages. For example, you will be notified when the wind reaches a certain speed. With the wind gauge you can determine the best time for activities such as sailing, cycling or golf. The anemometer only works with the separately available Netatmo weather station. You can only connect one anemometer to each Netatmo weather station.