Voice recorder.

voice recorder

    Records sounds and conversation on the flight deck.
    Jack for connection of a standard headset.
    ERASE button.
    The entire contents of the recording can be erased. Only possible on ground with parking brakes set.
    MONITOR indicator.
    Used to monitor the self test of the system when the TEST button is pressed.
    TEST button.
    When pressed momentarily a selftest is initiated.