The Tonfunk Group produces and develops high-quality electronic modules and instruments for items of capital expenditure in the automotive industry, medical technology, telecommunications, nautics, safety technology and in other branches. This includes a quality management certified for the production and development of modules and instruments according to DIN EN ISO/TS 16949:2009 based on DIN EN ISO 9001:2008. Protection of the environment is very significant for the Tonfunk Group, that is prooved by the certification according to ISO 14001:2004.