HomeMatic installation adapter, for Berker switches, B1 The installation adapter enables the seamless integration of the HomeMatic flush-mounted actuator series in the Berker installation system. The adapter enables visually unobtrusive integration in the existing installation and the continued use of the existing rocker switches. Suitable for the following Berker switches. https://elecena.pl/product/18215839/103094a2-adapter-set-berker-1-universal-adapter 2021-05-01 https://elecena.pl/product/18215839/103094a2-adapter-set-berker-1-universal-adapter 2022-05-20