Ok, it is an extension. Charging and data transfer function, hence 4 stars for it.
Which I think is not the point: the length !!!
In the description are indeed about 50cm so I've already screwed down my expectations, even changed my 2 zuzulegen ...
The cable supplied is only 45cm. The supplier can nix for, and return therefore also bringts not.
It does what it should. But you should see whether a sufficient length.