Surprisingly, however, it is likely Vinvanco have escaped if you eg want to connect a turntable directly to an active speaker through this adapter, an obviously existing ground connection would be imperative principle!
Pinch ground wire in case screws or even outside can drüberzuwickeln the power plug in the worst case, not only electric shock but also cause short circuits and cable fires, in such a case, it may even happen that does not prejudice the insurance cover, as it is a incorrect use or improper connection is an electrical appliance.
I've now done a so-called "Internal Ground Mod" to this problem to solve professionally on my turntable.
Had I the same unit unpacked after I received it, it would have been promptly returned!
So in short Nogo! rather get one of HAMA, Friday or Profitec!