Best selling usb car charger

Really did not think, ah, now there will be such a good thing, I really was the first time I heard, I said that now Best selling usb car charger, in fact, the beginning of time, I do not know this Best selling usb car charger, because I usually for such things very interested, but for friends talking about it, I really do not know anything about it, just now, I chat with friends, they talk about topic about cars, I did not say anything at the time, and later a friend spoke of this Best selling usb car charger, said that many people will buy this thing, because it is really very convenient, although I know not a lot, but I also understand the practicality of this thing.