Components for ConferenceONE with IntelliMix include a C1-Ci chairman unit, an expandable base of C1-Di delegate units (up to 60), and a C1-PS 60i power supply. All units are equipped with a push-to-talk button, an individual loudspeaker, and adjustable earphone jack, while the chairman unit offers additional control of the delegate units. The systems also offer a telephone/CODEC interface and a linking port to facilitate use with external Shure SCM automatic mixers for additional wired or wireless microphones.