The command information to turn on the thyristors therefore can not simply be sent using a wire connection it needs to be isolated.

In purely mechanical plants, the levers operate the field devices, such as signals, directly via a mechanical rodding or wire connection.

Older remote control systems use a direct wire connection to the pan/tilt head to manually control the cameras position at the top-end.

A wired connection will enable streamed content to play sooner, at higher definitions and hopefully without stuttering.

It will also act as a speakerphone if you get an incoming call, and there's a 3.5mm socket for a wired connection (cable not included).