One end has a female 1/4" inch Stereo TRS style jack. On the other end there are two Left Right (red / white) 1/4" inch male plugs. It separates the audio into a left and right individual 1/4 signal. Be sure you use a stereo TRS cord with the female side of the adapter. If you use a mono TS cord inserted into the TRS female input, it will not work properly. You may only get sound from one side or none at all.