The HCS-48U10DDS/50 is a Fully Digital Congress System Discussion Unit. The multi-functional delegate unit meets the demands of even the largest conferences. It provides facilities for speaking, listening, and selecting language channels. Excellent immunity to RF interference from mobile phones. It features dual channel selectors, the microphone buttons provide dual delegate identification, used for individual delegate identification on the left and right. A graphic OLED screen can display operation menu, channel number and language name. Channel selection is automatically limited to the number of language channels available. The loudspeaker offers superior acoustics with minimal feedback for enhanced intelligibility. Compliant to IEC 60914. "Closed Loop - Daisy Chain" connection topology for a high operational system reliability: breakdown or replacement of a congress unit and connection failure of a cable will not influence other congress units in the system. Based on TAIDEN originated MCA-STREAM digital audio processing and transmitting technologies. Proprietary MCA-STREAM technology used to transmit fully digital audio between the congress units as well as between congress units and main unit(s). Audio signals processed by high performance DSP: sound quality approaching CD quality.