Hi Eric
Sorry for the delay in getting back to you - we've been having some problems with the website recently.
Voltage won't be an issue in the four countries you are visiting. You will need two types of the European-style round 2-pin plug (CEE7/4 and CEE7/7), so I would recommend investing in a universal adaptor. You'll also be able to use this on future holidays, wherever you are in the world.
I hope you get this message in time.
Kind regards,
Olly, your editor