Each B2080-PG Chairman unit has the same features described for B2080-DG Delegate units, plus the possibility, using the double key, to join in a conversation or to activate the Priority function. The Priority control excludes off all the other microphones.Each unit is supplied with its own cardioid electret microphone mounted on a 43 cm long flexiblestem and a ring that lights up to indicate that it has been activated. Each unit also has a push-button for requesting to speak, a built-in loudspeaker that is automatically excluded when the station is active and a volume control. The Chairman can also listen to the discussion via a headphone or an earpiece to be connected to the socket provided for this purpose (3.5 mm jack). As soon as the jack is connected, the built-in loudspeaker is muted. A double RJ45 socket (IN/OUT) on the rear panel enables cascade connection to the other stations or to the control unit, using CA-T5e SF/UTP shielded cable.