Can-Bus Kit BMW Power + Speaker (ISO) + DIN Antenna Connector If the OEM radio installed ex-factory is to be replaced by an retrofit radio in a vehicle controlled by CAN Bus, a specific CAN Bus Adapter is required.    Specific and universal CAN bus adapters convert relevant digital data of the respective vehicle-specific data bus into analogue signals. Depending on the adapter, different signals or comfort functions such as ignition plus, lighting, reverse gear signal or also a speed signal are read out and provided analogueously for different retrofit solutions.    Our support team will be happy to help you with your selection.  02431-9645-96 support@acvgmbh.de Note: Can-Bus connection: Quadlock outputs loadable up to 1AAntennenadapter Fakra / DIN Permanent power connection Battery secured for the following vehicles BMW 1er (E81/82/87/88) 03/2004 - 10/2013BMW 3er (E90/91/92) 03/2005 - 09/2013 the following signals are provided:Ignition lighting Reverse speed pulse PDC rear optional: P