The four plugs of the charging belt have different functions, and the first plug may be the data cable of the Android system.
The second plug is probably the tapc cable.
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The third one might be for computer use,
The fourth may be the data cable used by the headset. So the four plugs of the charging belt means that you can charge four mobile phones at the same time. This can be convenient for us to use together when we do not have a charging bank.
It is used for different mobile phones, because the charging interface of mobile phones is not the same