I bought it years ago in 2015 for around 70€... disappointment, with half the money you can get something much better and reliable!

I have had the product for about 2 months and I am particularly dissatisfied with its performance, from the very first day. Unfortunately, the only review I read before purchasing it was extremely brief and positive, which misled me. However, the reality is clearly different:

- The most significant issue with the device is the accuracy of the readings. I find the deviation between the internal and external unit when they are in the same space unacceptable. This deviation ranges from 0.7 to 1.7 degrees consistently. Therefore, any discussion about the accuracy of the measurements is inherently ridiculous. Devices with much lower cost have the same (or possibly better) accuracy, which I tried after this one.

- The second major drawback is that the readings can only be viewed from minimal viewing angles, specifically only from above and straight on. If the device is not directly in front of me and clearly lower than my position, it is impossible to read.

Other than that, in terms of functionality, build quality, and appearance, the device is okay. But if you can't trust its readings and if you can't see them anyway, what's the point of buying it? I would not recommend it under any circumstances.

Measurements are okay (very small deviation),
In weather forecast, it performs much better than the television and various websites (meaning if it says rain, it will come in at most two days), the negative is that the time runs ahead (I haven't figured out yet how it connects to a satellite, but I haven't looked into it much), it takes 3 AAA batteries but it's better to have it plugged in with its transformer.
You can have it on continuously but it can also turn off after 3 seconds. It looks very nice in the dark but you have to be directly in front and above it to see it.
The external unit shows humidity and temperature and only works with batteries.
There is a distance of 10 meters between them with a wall, and sometimes it loses the signal, but it comes back quickly.
I've had it for over 2+ years and what surprises me now is its price. Plus 20+ euros!
I bought it for 50 euros.

I read several comments before purchasing it, both from abroad and from Greece, but I chose to trust the 5 stars it received from Greece. I wasn't satisfied with the purchase, but I'm not completely disappointed either. I will provide an extensive review and you can judge for yourself if the product is worth its money. If it cost less than 40 euros, I would definitely recommend it.

1) Screen 3/5: Here is where the negative review from the international ratings comes in. Indeed, the viewing angles are not the best, especially when it is at eye level or higher than us. However, when we stand higher than the point where it is placed or when we are standing, then the readings are quite readable. For example, if you have it on the kitchen table (a high point) and you sit on a couch (lower), you won't be able to read what is displayed on the screen. If you have it on the desk and you sit on a chair or you pass by standing, then things will be much better.

2) Build Quality 3/5: For the 40 to 45 euros I paid, I consider the build quality to be average to good. For the 70 and other crazy numbers I see, I would give it 1/5, and that's a stretch. From a distance, it gives a very good impression to the eye, but if you examine it more closely, you will understand what I mean. One negative aspect is that the power supply gave up on the second day of use. Since then, I have been using it with batteries, which have a very satisfactory lifespan, see comments below.

3) Functions 4/5: Readable time with large letters. Readable temperatures and humidity, both indoor and outdoor. Quite accurate weather forecast in many cases, a pleasant surprise. There were also moments when it said rain, but there were clouds or very light cloudiness. Barometric indication, moon phase, day, and date. The alarms didn't work, but I think you can set up to two. Overall, many options and a variety of functions.

Stable communication with the external unit, even though it was placed 5 meters away, with a wall in between. There were no communication losses at times.

The screen has two options for its brightness, either continuously on or after activation for a few seconds. As I mentioned above, because the power supply broke, I used the second option. Here, we can activate it with a sound (knocking on a desk, clapping, etc.). With the second method, I get over 2-2.5 months with the batteries, but this also depends on how often we activate the screen.

4) Temperature and Humidity Measurement 3/5: I left the most important aspect for last! I believed that for its price, it would provide an accurate measurement of temperature and humidity. There is not much difference compared to another thermometer and hygrometer that I have, which cost around 7-10 euros. Almost the same measurements, very close, with better accuracy for this particular one, but don't expect huge differences.

A big disappointment is the fact that the indoor and outdoor units, placed in the same space, had a 2-degree difference in temperature and 10-15% difference in humidity (the outdoor unit being higher). What can I say, maybe it was just my case.