Terms Listing Glossary Terms (271)

Audio jack


A common connector for plugging in a standard pair of music headphones such as the ones found on music players, computers and most other electronic devices with audio outputs.


It can support stereo and/or microphone, depending on the number of separate connector rings on the jack.


Some phones offer only a 2.5 mm jack, which is a smaller variety of the same principle.


Headphones supplied with mobile phones usually have a mic somewhere along the cable and a remote button that allows for managing calls without using the phone.


Some manufacturers opt for placing a 3.5mm audio jack on this remote control instead of directly on the phone itself. The reason for this is that 3.5mm jacks take up quite a lot of internal space; plus, in this way the user gets to keep the remote control/mic functionality while using third-party headphones.


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