He makes no noise, the LED lamp lights up when electricity flows through and you can charge 2 devices so great, be it iPhone and iPad or Samsung Galaxy. Each phone for which you can use a USB cable for charging, one can hereby invite. And so far I have not found that the phone will run less time or if the battery has suffered somewhat.
On holiday, it is totally practical, so you do not have to take so many plug, since everyone in our household has 1 mobile and we also have tablets that everyone wants to be loaded. In addition, a road often not so many outlets are available. And through the narrow slot shape has nowhere problems of not being able to use it.
So I can only recommend all the equipment.