1.The unit has built-in the MCU control circuit,it can   realizedigital management.
2.The microphone unit has built-in high fidelity of capacitor sound head,   its sound quality is clear and  low   noise,it has strong pickup distance.
3.The meeting model:FIFO/LIMIT/FREE.
4.The chairman unit can turn down the delegate for anytime by priority   button.
5.The annular blue indicator lamp can show the working state on   microphone.
6.The microphone's appearance is patent design.The base of material is   metal.
7.It use the long life service and no noise of touch swith.