A:AnswerI used this charger on my iPhone 4 in Spain and plugged my Apple USB cord directly into this USB adapter with no other devices and safely charged my phone on a ten day trip at several different locations. Also charged a portable charger off this device with no problems.
A:AnswerWe just got back from that river cruise. Yes it works in all those countries. You will only need one adapter for the plug they all use the same. I charged two IPhones & Two IPads with it. Works great. Enjoy you trip.
A:AnswerAnything that uses USB can be charged without a converter. I used it on & off ship on a river cruse on the Danube it worked fine on my IPhones & IPads. It should work for you.