I recommend this article I bought for US and works perfectly! I coupled to a power strip 3 sockets + 2 USB: http://amzn.to/1bUvFMX All this allows me, in the USA, load 2 simultaneously smartphones and benefit from conventional 3 taken one with earth connection for a laptop by-example. Finally, the price is much more interesting than in large area or in airports! I suggest you even buy 2 ... Amazon delivery on time, as always.