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| R4, R6, R7, R30, R31 | 5 If we expect or plan on developing modules which use the 4 pins (http://www.qingpu-electronics.com/en/products/WQP-PJ320D-72.html 3.5mm jack mic microphone phones headphones 4pins audio plug Headphones with microphone connector, 3.5mm, 4 pins RGB RGBLED LED, Round, FlatTop, Rectangular size 5.0x2.0mm^2 z-position of LED center 2.0mm 2 pins diameter 8.0mm 2 pins diameter 1.8mm.

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