Why is adaptor needed

I have a Sony Mini Hi-Fi MHC EC909ip system with docking station for iPods and iPhones and it states to I needed an adaptor despite the iPhone plugging into the docking station and working fine. I asked Sony why adaptor needed and they said if it works, I "probably" don't need one. But from reading these reviews, seems that is not the case. Can somebody please explain why an adaptor is needed?

  • Asked by Karen L from Mornington
  • Nov 18, 2010
iPhone 3G Universal Dock Adapter 3-Pack

iPhone 3G Universal Dock Adapter 3-Pack

Product No Longer Available

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