I have it for about a year now.
It does its job and if you plug it in, the LED stays on.
If you don't plug it in, the LED lights up for a short time when you request it by pressing the corresponding button.
It has different colors for the LED.

The screen is not curved as the description says. Curved is the plastic. It only works with electricity, nothing appears on the screen with batteries. Nice lighting but it needs to be plugged in. The measurements appear accurate compared to other meters. The wireless sensor is very slow in sending the data. It's not worth its money.

Beautiful with a very clear screen. Ability to change colors and brightness. It is recommended to be used as a bedside clock-alarm permanently plugged in, so that one can enjoy its screen. As for its measurements, the only comparison I have made is with a cheap simple Chinese one. Strangely, it seems to respond slower to temperature changes. However, its indications seem close to reality. Obviously, do not expect any weather forecast, it is only possible with the use of barometric pressure.
In general, it is good to have an idea of what is happening inside and outside of your home. It can also replace the alarm clock in the room.

Very good screen contrast with clear letters for readability. Perfect device and font size, pleasant appearance, and very easy and fast connection between the device and the sensor. I have no way to verify the accuracy of the measurements, but the weather forecast based on the barometer clearly does not work, as since yesterday when I activated and set it up, it has not changed while the weather has changed from sunny to cloudy and today it is raining.
15/5/2021. In the end, the weather forecast is never accurate. When it's raining, it shows sunshine and vice versa. As for the rest, I am very satisfied.

For the money, it is excellent. Clear screen with many colors and it looks great from every viewing angle.