The Bosch CCS-D Delegate Unit is intended for use with the Bosch CCS 900 Conference System. Delegate Unit features a built-in speaker and an adjustable gooseneck microphone. It's Possible-To-Speak LED illuminates to indicate when it is possible to activate the microphone. The CCS-D Delegate Unit's loudspeaker mutes automatically while in use, features a red LED ring to indicate power and a headphone output with dedicated level control.