With SlideSync, you can broadcast an event without needing to have all your speakers in the same room. This feature is available to all subscriptions.
All you need to do is create separate Speaker accounts for all your speakers.
Speakers can join the event with their webcam using the Live Producer page. When the event goes live, the combined stream will be shown to the attendees in a tiled layout.
If there are three speakers or more, the stream coming from the person currently speaking will be shown bigger to the attendees.