My USB cable has 4 colours, red, blue, brown, and yellow. What are the positive and negative? - Quora
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Peter Jäckel 17593 USB Cable 1.5 m USB C Micro-USB A Multi-Coloured - USB Cables (1.5 m, USB C, Micro-USB A, 2.0, Multi-Colour) : Amazon.co.uk: Electronics & Photo
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