Hello my fellow friends!

I'm a little bit confused. I'm trying to get a cable for my Iphone4 so I could run audio and video files from my phone on my F920BT. The main problem is that I don't know which cable to get, cause on the CA.IW.-51V cable description it says (Iphone4), so what does it mean, that CA.IW-50V doesn't work with Iphone 4 or what??

Maybe you guys already tried to connect your iphone4 with CA.IW-50V cable? Does it work properly? I have a better deal on CA.IW-50V cable so, If there is no difference I would rather get this one...

Thank you and have a nice day!