I should add that
[After exactly one year of operation, the 3 AA batteries required for the external sensor system of the roof needed to be replaced. Otherwise, the same opinions still apply where ... I still have the same opinions about the device (internal and external) which both function smoothly while there has been no need to replace the batteries yet. The forecasts provided by WunderGround based on the measurements of the weather station have proven to be accurate for at least the 10-day period given. Ultimately, I prefer the overview of the station from the internet browser rather than the android app.]...
I have placed the external sensor system on the rooftop of the apartment building at a distance horizontally and vertically from the base station of 25 meters and more, which is a typical distance between the ground floor and the rooftop of apartment buildings, and the signal remains strong.
The indications provided by the sensors are quite accurate. The internal screen is vibrant and bright at high brightness, and its size is very satisfactory in terms of observation. If there is a small issue, it is with the viewing angle, which is excellent when the viewing is done at approximately the same level as the screen, but the clarity decreases as the viewing angle becomes higher.
The variety of functions it offers works exceptionally well with all its sensors, and the forecast predictions provided by WunderGround are quite accurate. The real-time online monitoring through the mobile android app and the browser on Windows is excellent as well. The device's connection to the wifi router and the outside world on the internet is done in AP mode (Access Point, meaning that it can be activated at any time by holding down the wifi button for 6 seconds, and then the "AP" indication flashes on the screen), and it did not encounter any issues and was completed as the instructions explained without requiring any repetition. ***
Note 1: The remote sensor system that is installed on the roof should be oriented with the symbol "<--N" engraved on the top part of the device facing north in order for the transmission of wind direction information to be accurate. Otherwise, there may be deviations in the wind direction. For this reason, in the initial settings (192.168.1.1), there is a related correction field in the Advanced option, allowing for correction up to +-10 degrees of deviation from the north.
Note 2: Another feature that I would like, but apparently it does not have, is the ability to operate with batteries as well. Because although it normally displays with the power supply it has, from what I have noticed, the CR2032 battery it has is not for displaying the information on the screen, but only for maintaining and transmitting the settings. (Understandable, of course, since with such a large and bright screen, how could it function with just one CR2032 battery?)
I have been using the device for only 3 days, and if I have any other observations regarding its durability, etc., I will come back in the future.