If you want to share the output, that's fine. Don't read any further because you will love it. If you want this to combine two mics, you're in for a bad time. This cable (or a similar cable) will not work with TRRS - the combo input/output connector on all phones and most laptops. The TRRS specification only supports a monaural microphone. So make sure the device you want to connect it to supports a stereo microphone. And that's not because of this device. It works as it should.
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