1.The unit has built-in the MCU control circuit,it can   realize-digital management.
2.It uses the environmental protection, low power consumption and  seal of the touch switch.
3.The ON/OFF state,dynamic level and    volume of microphone can show on the LCD.
4.It uses the electronic code switch to adjust the volume.
5.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 and it has suppression the howling   function.
6.The unit has built-in speaker and headphone jack,it can play background   music and expansion the voice.
7.The annular blue indicator lamp can show the working sate on the   microphone.
8. The chairman microphone can turn down the delegate unit by priority   button.
9. The base of material is metal, it more stable and more generous.