You won’t get a transformer in one of these – and, with a lot of power bricks, you don’t need one. Still, this one may make it into the bag for my next vacation. Travelon makes one that takes round or flat prongs, and configures it the way you need for a given trip. It comes with every conceivable international plug, and it comes with a variety of different types of plug sizes and plug sizes depending on the length of the length you need.”]
Source: https://gizmodo.com/belkins-mashup-surge-protector-and-usb-charger-is-perfe-366244