Built-in power supply device and signal amplify,which can support more than
70groups of the speech enquipment;
Four groups of 9P-DIN plugs for severla systemes Join;
Can offer the power and date communication socket of video central processor;
Possess the output socket of audio frequency equipment;
Equipped with BAL socket of connecting kinds of rsult device;
Built-in telephone coincidence for telephone meeting;
Built-in volume processor for volume regulating
Sell Multi-functional Meeting Microphone 
