In fact they do nothing! It is a counterfeit!
To own an authentic bumper apple comparison does not fool anyone as to the quality, as the finish of the price ... It is true that in for money at this price!
So this is a real deception!
It is on this bumper will not empower my phone and leave directly to the trash.
A bumper is presented as a simple protection without reference to the brand apple is one thing.
Is presented as a bumper apple origin is another, especially when that statement affects the purchase!
Amazon would do well to ensure that these sellers do not deceive its customers!