3.5MM JACK問題

市面上有部份耳筒連MIC/有MIC既延長線
既3.5MM JACK 係 3CHANNEL既(L,R,MIC, GROUND)
有冇 1x3.5MM(3CHANNEL) ->2x3.5MM (L/R:2CHANNEL)(MIC:1/2CHANNEL)既轉插?