Have 2 ordered, one of them has ever clamped to push the kopfhörerste ier in the socket while trying ... Forcing push has innendrin probably all directed .. Then both folded prima! To use the adapter came now for the first time .. with Air China Has properly funktionier down to the fact that in the announcements of the crew's ears are blown away, because the impedance is anderst compared to the normal airplane headphone! Despite good adapter!