The Bosch CCSD-DL is the long-stemmed discussion microphone for the Bosch CCSD DL Discussion Device. A built-in speaker enables the discussion to be followed and heard clearly, but there is also a headphone socket with volume control. A clear color-coded LED illuminates to inform the user when the mic is active and ready for use (red), in a queue (green) next to speak (flashing green), or possible to speak (white). The red and green LED light indications also illuminate at the head of the CCSDDL mic