It's hard to imagine what else users would need for wired connections, except maybe optical audio out. (digitaltrends.com)
: When possible, you should use wired connections for devices where available and only use wireless connections when necessary. (support.plex.tv)
In most Bluetooth earbuds, the signal from a device is transmitted to one of the buds and transmitted to the other via some kind of wired connection between them. (technewsworld.com)