LP - 900 - m series is a kind of intelligent conference discussion system. Simple operation, can take 50 seats meeting unit, noise reduction is good, work mode are: limit mode optional "1" "2" "3" "4" "6" and automatically shut down microphone mode optional "1" "2" "3" "4" "6". Have a meeting, outside the sound input functions such as monitoring, convenient installation and debugging. System, chairman of the unit, with interrupt button, can close to attend microphone under any circumstances, convenient for management meeting to order.