This 3.5mm headset splitter cable is perfectly designed to connect your headsets which have a separate headphone(ctia) and microphone(trs) jack to a pc, laptop, or tablet, solving the problem that the headphone can not be connected to a computer that only has a single 3.5mm earphone jack. please ensure the headset and microphone are plugged into the adapter before plugging the adaptor into pc, otherwise it will not pick up the mic.