Cissy; I don't honestly know - yet - I can tell you that according to multiple other threads on this forum that the common opinion is that the infinity-badged becker radio that we have is not changer compatible. There are other becker radios built on this format that are . The little investigating I have done shows what I believe to be an optic port that actually lights up when the unit first comes on??? Maybe some sort of leftovers from when they use this chassis in another application.