Dell U3421WE
3440 x 1440 pixels, 34"
Dell U3421WE
3440 x 1440 pixels, 34"
If by rotating you mean that the stand remains fixed and the screen can be oriented to the left or right, that's possible. However, if you mean putting the screen in portrait mode, that's not possible. Well, in reality it can be tilted by 1 or 2 degrees, just enough to put it upright, but no more than that.
Yes, it all works, seems to be missing from the description.