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The built in cable is USB C so unless your MP3 player uses that, you will have to use your own cable and plug it in to the USB port. Same goes for your iPhone - you will need to use your own cable plugged in to the USB port rather than the built-in cable of the charger.
Sorry, there was a problem. Please try again later.Hello, JIM. The car charger has a hardwired USB-C cable. The cable itself is not compatible with your iPhone. However, you can use a different lightning cable on the available USB port. Also, if your Sony MP3 player is USB-C compatible, then the charger would work with it.
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