Monoprice 100668 6-Feet 3.5mm Stereo Plug/Two 3.5mm Stereo Jack Cable, Black The 3. 5mm (1/8") stereo TRS connector is more commonly known as the Headphone Jack on portable mp3 players and mobile phones This splitter cable features a male 3. 5mm stereo (TRS) plug on one end and a pair of 3. 5mm stereo (TRS) jacks on the other end each with molded connector housings and strain relief boots This splitter cable is ideal for splitting the audio output from a mobile device so that two people using earphones can listen at the same time Warning: This cable is intended as a splitter only Attempting to use it to combine two stereo signals into a single stereo signal can cause damage to your equipment