Very cheap and basic, it needs adjustment/calibration with another one you already have in order to be accurate, otherwise it shows what it wants! It worked for me but I do not recommend it.

It works just fine. To set it up, you wrap the device in a damp towel and after a few minutes, you place the needle at 100 with the help of a small screwdriver from the back side.

Honest for its price. I set it up with another reliable one and it doesn't lose even half a degree in temperature. For humidity, it is very close to reliable.

The needle you find on the glass and it doesn't move, the mechanism moves ready to scatter when you go to turn the indicators from behind.

First of all, it is much larger than I thought (however, it is indeed 12.5cm in diameter as correctly stated in its description).
I bought 5 pieces and put them all together in different conditions to see how their measurements match.
They all showed very little difference. And comparing them with the electronic Thermometer/Hygrometer that I have, it confirmed the measurements. For the small differences, both the Thermometer and the Hygrometer have a small screw at the back to adjust it.
All in all, a great product for its price.

I compared it to the air conditioner's thermometer. They showed the same.
From this, I conclude that it is generally accurate.

Waste of money. Cheap Chinese knockoff, they didn't even bother to translate the correct text on the dial (see photo). Obviously, it shows something else instead. I should have bought one for half the price from the bargain bin

It's not worth it!! Firstly, it is bigger than my palm, something that is not apparent from the pictures, and secondly, you need to have another point of comparison for temperature and humidity and then adjust it on the thermometer... in other words, it doesn't measure on its own, you have to adjust it yourself first!!! Good luck finding a way to measure humidity... it's all over the place!!

If the initial adjustment is done correctly from the screws on the back side, it is very accurate. Also, it should be mentioned that the indications are precise if we have it in a point where there is no air currents.

It doesn't work at all, it doesn't open from the back to adjust it, and it is very big in size. I threw it away

Reading the reviews of others, I will say that in my basement it takes very accurate measurements (maybe with a deviation of 0.5-1.5 degrees, but not 5 as some reviews claim). After all, it is important to know what you are getting it for! For example, I just want to know the humidity and temperature of the basement, not with absolute precision, but certainly not with a deviation of 5. And it does its job perfectly fine. I hung it on the wall where it is silent and easy to read!

Quite cheap
It needed adjustment of course, it "troubles" you for about 2 minutes, but then it works fine wherever you park it.
If you move it and shake it on the way, it needs adjustment again because it has sensitive needles.
I adjusted it with an analog one I had, I left it next to it for 4 days to see what measurements it gives for any deviations, but they showed the same.
I recommend it for a second one, for example for the basement where I got it, it is decent

Unfortunately, it does not measure correctly, if you move it a little, the indicators move. With -1 outside, it showed 3 degrees higher and said it was dry.