It took me time to understand that there was a way to put it in the cigarette lighter to the USB sockets are working (the pink part of the tip should be on the side of the notch on the periphery of your cigarette lighter) and now it's working. I checked USB Car Charger + function. I have not used long term, nor all taken together. But it does not take too much space and I can simultaneously connected GPS, laptop, tablet and DVD player ... Happiness!