switching device 1 is designed similar to the switching device 1 from fig2 whereby a one state switching element 3 with switching states 0 and i is provided in this case an operating element 4 is also used as a key or push element the actual switching element 3 which assigns a switching signal 0 or i to the corresponding operating state of the operating element 4 is shown schematically a total of two electrodes 5 and 17 are additionally provided on the inside of operating element 4 electrode 5 being provided for capacitive data transmission and electrode 17 serving for power transmission to the mobile id transmitter 13 the annular electrode 17 then encloses the circular electrode 5 it is also conceivable that the two electrodes 5 17 are exchanged so that no changes are produced to the method of function of the switching device 1 in addition fig5 shows schematically the individual plug contacts of plug 9 the switching device 1 is preferably connected to the control unit 10 by a standard plug instead of an electrical connection 20 an optical or optoelectronic connection 20 to the control unit 10 can also exist naturally the connection 20 can also be achieved by an ordinary interface or an ordinary data bus format a top view of another variant of the switching device 1 according to the invention is shown in the last fig6 this essentially shows the operating element 4 illuminated by a display element 7 at least the inscriptions u201c on u201d and u201c off u201d can be displayed on the operating element 4 by the display element 7 for this purpose the operating element 4 can consist of a transparent plastic a film 23 with.