* With new digital design.
* With ring-shaped speech indicator light that can show the state of speech. Red light stands for in a speech, green light stands for waiting for a speech.
* The special designed microphone shield can eliminate the "poop-poop" low frequency sound even without using the windproof cotton cover.
* The chairman is unrestricted by microphone modes and number of speakers.
* The chairman unit has full-control priority and can be placed in any position of the loop. The units adopt hand-in-hand cascade connection mode, convenient for installation and maintenance