Speech Prompt Module is a displayed line-by-line reproduction of the speech to assist the speaker. The lecture unrolls smoothly and can be controlled manually or automatically. HCS-4100/50 application software is comprehensive, reliable and user-friendly. But it is also an easy care software system which Helps the operator to manage the conference efficiently from the very beginning of a meeting until the post-meeting work. With the PC installed HCS-4100/50 application software connected into the FDCS, operator can manage all aspects of the conference centrally. The operation turns out to be easy and efficient.