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> looking at new wireless headphones with mic that also supports 3.5mm jack (aux).
> ask manufacturer if this headphone accepts a 4 pin (TRSS) 3.5 mm jack or 3 pin (TRS) 3.5 mm jack.
> they don't understand
> pull out illustrated diagram explaining the differences between 4 pin jack and 3 pin jack.
> they laugh and say "It accepts 3.5mm jack, sir"
> Buys headphone
> it supports 3 pin jack, now the mic doesn't work.

#HeadPhones