It is an expensive product for what it is (and some electrical sockets son), but it has the merit of work. On my Peugeot 207, I can actually reverse the son of 12V and 12V permanent, you need to know (a bit of research on the net and found) and once made handling (not complicated and very fast), it works very well. Too bad this adapter was not included in my kit Parrot bluethooth, it would have earned me time and money. The main thing is that everything works; I am writing this review over a year after purchase, Nikel and everything works like new. So I recommend this product despite its price, anyway, hard to do otherwise, if you do not have it, you can not tinker nothing for yourselves, it's just not possible.