1.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.
2. It uses the environmental protection, low power consumption and  seal of the touch switch.
3. The unit has built-in speaker and headphone jack,it can play background   music and expansion the voice.
4. The annular blue indicator lamp can show the working sate on the   microphone.
5. The ON/OFF state, dynamic level and volume of microphone can show on the   LCD.
6. The meeting model:FIFO/LIMIT/FREE. 
7. The chairman unit can turn down the delegate unit by priority   button.
8. The base of material is metal.
9. It can be desktop and embedded installation , to meet a variety of   meeting places installation requirements.