1.The unit has built-in the MCU control circuit,it can   realize-digital management,it has video auto-tracking functions.
2.The microphone unit has built-in high fidelity of capacitor sound head,   its sound quanlity is clear and low noise,it has strong pickup   distacnce.
3.The meeting model:FIFO/LIMIT/FREE.
4.The chairman unit can turn down the delegate unit for anytime by priority   button.
5.The annular blue indicator lamp can show the working state on   microphone