Frames supplied by a supplier in China came by registered mail after about 2 1/2 weeks an.Nach opening felt a surge undefinerbarer Chemical fragrances entgegen.Die ends were blank and the cable wabellig and worked un- stable and did not make the impression that the requirements of a safety review withstand würden.Daher equal in the trash and the experience: "Always look where the imprint of the supplier is based hat.Es are indeed several providers where one or the other is based in Germany and has quite recommendable .An star because I have to assign a !! !