PowerArc ArcStation Pro Wall Charger is engineered with GaN technology that allows the ArcStation to be 30% smaller than the standard 18W iPhone charger. Also, it allows the charger to operate with higher efficiency and generate less heat than your standard wall charger. And for added safety, the wall charger is also built with over-voltage, over-current, short-circuitry, and leakage protection. Take it everywhere you go for optimum charging!