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USB A to 3.5mm Audio
computer or charging device. Pin
computer or charging device. Pin
Direction Hyunwon device. Pin
Hyunwon device. Pin
Tip 1 --> 2 Data + copper<->white
2nd ring 2 <-- 3 Data - blue<->green
3rd ring 3 --> 4 Charge + red<->black
4th ring 4 <-- 1 Charge - green<->red

The 3.5mm audio cable I was using may not be or there may not even be a standard that correlates the cable colors to the rings or tip. I have not looked. I will post pictures of this on (my personal website) at some point.

4 pin USB A receptacle схематический вид разъема
Разъем 4 pin USB A receptacle
at the computer or charging device.
4 pin 3.5mm (2.5mm) plug схематический вид разъема
Разъем 4 pin 3.5mm (2.5mm) plug
at the Hyunwon device.
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