It works perfectly. Rarely to never disconnects but then automatically reconnects. Real-time notifications for rain start. It should not be far from the central unit. It does not need to find Wi-Fi, it communicates with the central unit which is necessary. On its own, it is "useless". Many placement options. Beautiful application with informative widgets (also on iPhone). I haven't changed the batteries for over three months yet. It complements the station's data.

Finally it rained and I was expecting to see the measurement from the super-duper amazing meteorological station. It flooded, but it showed 0.