What are cans in the context of theatre production?

In the context of theatre production, "cans" refer specifically to headsets and earpieces used for communication among technical staff. Effective communication is essential during performances to ensure synchronization and coordination among the various elements of the production. Technicians, stage managers, and other crew members utilize these communication devices to relay important information quickly and discreetly, allowing the show to run smoothly. This setup is vital for addressing any technical issues or cues without disrupting the performance, highlighting the necessity of clear and efficient communication in a live environment.