Only an adapter that will allow you to plug a UK 3 pin plug into a European 2 pin plug. I bought one from Sainsburys for about £6 and it goes all over the world including USA and Australia. The voltage in Europe is about the same as ours, so you won't need to convert the voltage. If you take it to the USA or any other country with 110v then you'll need a voltage converter as well because these adapters don't convert voltage. But if you're only going to use it in Spain a £6 plug converter will do.