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4 pin USB A plug connector layout
4 pin USB A plug connector

for Qumo Float waterproof audio player:

USB pin name USB pin number direction Jack pin number Jack pin name description
GND 4 -?- 4 GND  
D+ 3 -?- 2 D+  
D- 2 -?- 1 D-  
VCC 1 -?- 3 VCC  


4 pin 3.5mm (2.5mm) plug connector layout
4 pin 3.5mm (2.5mm) plug connector
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Qumo Float USB to 3.5mm Jack (4 pins) datacharge cable visual pinout:click to enlarge
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