To charge your digital cameras, laptops, etc. in Europe during your Incantato performance tour, you will need an adapter. The U.S. plug (2 or 3 prong here in the U.S.) will not fit in a European socket. In most cases the European socket takes a plug with 2 round prongs.
The adapters allow an U.S. plug to plug in to the back of the adapter and the front of the adapter plugs into the European socket. You'll find adapters at stores like Radio Shack, Walmart or online at amazon.com.