Powering dual 5VDC, 2.4A USB ports via a switch in vehicle
The photo has more surroundings than the plug itself so it is hard to tell. But based on the huge inductor, most likely that is a switch mode power supply, not a linear regulator, so if it can deliver 24 Watts of power on output, it will take a bit more than 24 Watts power on input, and so it will only draw a bit more than 2A of 12V from car. (If it were linear supply, it would have to dissipate 33W so it would just melt).