Fancasee (2 Pack Replacement 3.5mm Female Jack to Bare Wire Open End TRRS 4 Pole Stereo 1/8" 3.5mm Jack Plug Connector Audio Cable for Headphone Headset Earphone Microphone Cable Repair

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These were quite useful: I was constructing an audio combiner, so that I could hear the audio output of two different desktop computers. This is what I used to provide an attachment point for the headphones I was using.

I bought this before looking at the reviews. When I came back to this page to check the diagram, I was worried that something would be wrong as both reviews were from people who had issues. I went ahead and tested each wire, and they all line up exactly as is shown in the diagram. I attached a video of me testing each wire individually.

Used to create adapter cable for Gaming headset to ICOM 7300 radio

instructions available on product site, good contacts, just had to plug them in the connector of the first aux socket to create an additional aux for my vehicle.