The stereo TRS connector is more commonly known as the Headphone Jack on portable MP3 players and mobile phones. This cable features a male 3.5 mm stereo (TRS) plug on one end and a female stereo (TRS) jack on the other end, each with molded connector housings and strain relief boots. The cable is ideal for extending the reach of a fixed length 3.5 mm stereo cable, such as the cable on a pair of earphones.