The MDT button triggers KNX / EIB telegrams when the button is pressed, depending on the parameterization. Production in Engelskirchen, certified according to ISO 9001 Suitable for 55mm switch programs e.g.- GIRA Standard 55, E2, E22, Event, Esprit- BERKER S1, B3, B7- JUNG A 500, A PLUS, A CREATION, AS 500, A550, A FLOW- MERTEN 1M, M-Smart , M-Plan, M-Pure