An highly directional microphone is provided and a loudspeaker for low level local listening. The latter is defeated both by the local microphone and by those of the nearest units. It features:

• MICRO push-button: activates the microphone normally off.
• PRIORITY push-button: defeats all other microphones.
• Headphones jack: allows private listening with loudspeaker off
• Output level control
• Language selector: for listening to the normal program or different languages provided by two interpreters (headphones only).