The HCS-48U10DVE/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, registering a request-to-speak, registering a request-to-respond, listening, voting and IC-Card sign-in. Excellent immunity to RF interference from mobile phones. The loudspeaker offers superior acoustics with minimal feedback for enhanced intelligibility. Automatic system recovery and “PnP” (plug and play). Stem microphone can be unplugged during adjournment, easy to maintain. Mini-microphone, with foam windshield. Hi-Fi loudspeaker, minimal feedback, mutes automatically when microphone is active. Excellent immunity to RF interference from mobile phones and comparable devices. Microphone On/Off button, 3 voting keys. An ID can be assigned by default or manually to each conference unit bearing a unique serial number for convenient maintenance.