Stylus for the Fold 3 and 4 as it says - probably works for all. At the price I got it for, €25, it's okay.
It has a rubbery feel to the touch. It connects by itself without any process, I just brought it close to the screen and it was already working. It has a shortcut button on it.

In general, it's the accessory you didn't know you needed, especially if you have slightly larger fingers, as it helps with fine selections like magic erase in photos.

I'm giving it 1 star because it comes in a nylon bag, not even a little case to put it in - the store is not to blame, unfortunately - and the phone doesn't even have a provision to hold a magnet or something.
You will definitely need a case that can accommodate it.

User of the S-pen on Tab S-7 and Note 10 plus, the comparison was expected.

It's annoying that you can't write on the external screen and that you have to carry it in your bag.
Slightly more difficult to use compared to other devices due to the uniqueness of the screen, but once you get used to it, I think it's a useful tool!