Compact and ultra compact Blutooth meteorological instrument that tells you in real time on your smartphone: - The speed and wind direction - Temperature - The humidity - Atmospheric pressure No need to plug into your smartphone: Bluetooth connection Smart up to 30 meters. Easy to use: instant connection, by simply pressing a button. CR2450 battery, up to 3 years of life. Warranty 3 years manufacturer. Compatible with Android and iOS systems, it is used with an application (in French) to download from the Apple Store or Google Play.