An earphone jack includes an insulative housing and conductive first, second and third contact members. The decorative pattern may be printed material andor embossed patterns thereon, or a non-linear side edge that provides the decorative grass with a contoured configuration. The skin members andor the core member can be formed to a shape that corresponds to the desired contour of the structural member before the preform is assembled, e. A removable and replaceable substrate insert is sized to be placed on the substrate placement area for receiving food items thereon. The invention relates also to novel di oligophosphanediides and to the use thereof in the preparation of organophosphorus compounds. The radio station selector selects the radio stations to be used in the position calculation in such a manner that when reception timings of signals from two or more of the radio stations cannot be separated from one another, it is decided to exclude a signal from at least one of these radio stations.