It does what it says, but it is probably useful only for someone who doesn't have presbyopia. After that, it is too small to see.

It contains 2 small mirrors inside the package.
They are indeed very stable and provide good visibility either for something on the road that is difficult to see otherwise, or during parking.
I definitely recommend them and they are much better than some similar ones I had tried from Jumbo.

It is very stable and helpful. The issue is with the kids, there is always a fear that they will dismantle it for fun, so the glass is also at risk. We will see...

I consider that I have a smaller viewing angle (that's why 4 stars) compared to other same-sized ones I had. It adjusts easily, so the adjustment easily breaks when, for example, the pressure falls or when I clean the mirror with a cloth.
It doesn't easily come off, so there is no fear of it falling into potholes.
The packaging contains 2 pieces.
The price is very good.
It seems to be a regular mirror, but I could be wrong. Overall, you can see very clearly without distortions.
For its price, it's superb.