Berker is a family company founded in Schalksmühle in the Sauerland in 1919 . It quickly grew into a recognized switch manufacturer . By timeless classic switch design to intelligent building management systems , the extensive range of Berker offers you all . Berker is since 2010 part of the Hager Group. The system and product Berker includes fixtures and frames in numerous designs for standard and premium programs. Berker works like Hager with KNX.