The ATUC-50DU discussion unit is equipped with a 3-pin XLRF type input for use with compatible gooseneck microphones, including the ATUC-M43H or ATUC-M58H microphones specifically designed for the system.

The discussion unit also features a display for monitoring volume and channel selection, buttons for selecting channel, a built-in speaker, a headphone jack with volume control, two independently programmable LED indicators, and a talk button to turn the connected microphone on/off or send a request to talk to the moderator. On units designated by the control unit as priority discussion units, the talk button can be used to mute and override a non-priority discussion unit. Up to 50 discussion units may be connected to a control unit, using Cat5e (or better) cable employed in either daisy chain or ring topology.