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Pins and USB on the back of average modern car radio?
All modern car radios have these pins on the back, where goes USB cables (and USB cables are also part of the package).
What is the purpose of these USB cables? Can it be used to transfer data (eg. USB stick) and can it be used to charge device (eg. telephone)?
Also why one port has 4 pins and second port has 6 pins?
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