TL-3200 Desktop Digital Conference System

https://www.gonsin.com/products/conference-discussion-system/tl-3200-desktop-digital-conference-system/

TL-3200 digital conference system is a boardroom audio conference system that allows the delegate to speak, request to speak and listen to the speech. Each discussion unit comes with headphone jack and volume control for the delegate to listen to the floor audio, and adjust volume level for comfortable listening. 1 to 4 delegate microphones can be actived at the same time.