Also called a 3.5mm or 1/8" connector, it is a plug and socket widely used for analog audio signals in portable devices. For example, the headphone jack on iPods, tablets and portable DVD players ...

which superseded Apple's own 30-pin and Lightning connectors as well as the 3.5mm headphones jack. The Apple device contains the socket, and the cable or docking station has the plug. In 2012 ...