It's the MRA Vario screen. It comes with the spoiler pre-attached and that's the bit that does the magic. It's a bit taller than the standard GS screen, but I still look over it rather than through it. In fact, for me, I get the best wind protection with the screen lowered by one turn. Other than a bit of wind noise on my shoulders, this is great at "motorway" speeds.
https://www.bikehps.com/acatalog/BMW...html#aCOL67131