The first ultrasound wind gauge for your smartphone. Accurately measure wind"s speed and direction with this revolutionary solution. NETATMO wind gauge has no moving parts and uses the latest in ultrasound technology. It is maintenance-free and produces extremely accurate measurements, especially reliable in case of gusts. You can configure how you want to be alerted if the wind reaches a certain speed. The NETATMO wind gauge only works with the NETATMO weather station, sold separately. Only one wind gauge can be connected to a NETATMO weather station.