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.