The compact, well design box that the adapter comes in gives you a list of which countries use what block of the adapter. The lists aren't complete, but you can find the complete map on their website.
It's a lightweight adapter that takes up very little space thanks to its creative lego-like design. Great option for backpackers who are worried about weight/bulk.
This is one solid piece, so there is no need to play around with different parts to get the configuration you need. All you have to do is slide the toggle for the correct country and it's ready to use.