Here it seems to me, the plastic element to be solid connected to the adapter (which I have this additional precautionary measure has two components glue). In addition, the device is quickly and reliably detected by my laptop, the netbook and the big computer, which is not a given in such devices.
Whether the connection to the computer is made evident by a blue LED on the adapter, which is also quite helpful.
If there are still any problems with the adapter or with the service set, I will report later about it. So far, everything is exemplary.