These switches need no built-in box, no battery and no 230V! Easyfit generates its own energy every time you press the button. The transmission power generated is just enough to send switch commands but also to dim.
Easyfit from EnOcean can participate perfectly in frameworks of other suppliers such as JUNG-AS500WW (colour corresponds to WW), but there are many other brands they fit in such as; BERKER S1, B1, B3, B7 Glass, or GIRA Standard55, E2, Event, Esprit or JUNG A500, Aplus or MERTEN M-Smart, M-Arc, M-Plan. The delivery includes an adhesive film, so you can even stick the switch on the glass