- For integrating a retrofit device into vehicles with a fully active system ,- For a fully active system (also Bose fully active system) ,- For car radios with an ISO speaker output to an active system with a mini ISO connection (6-pin plug (yellow) or 20-pin plug (black)) ,- Control of the active system via the antenna switching voltage of the car radio , ,For Audi: ,- A3 ,- A4 ,- A6 ,- A8 ,- TT , ,Note for Consumers: ,Not suitable for partially active systems. - Radio Connection: ISO ,- Model: Car ISO Adapter ,- For Car: Audi ,- Specification: Vehicle Specific 2 years legal warranty only