1.The microphone unit has discussion and auto-tracking of   functions.
2.The material of base is metal,it using the flocking to process.
3.It has built-in antena and rechargeable lithium battery for each unit and   equip MINI USB charger.
4.The annular blue indicator lamp can show the working state on the   microphone.
5.The meeting model:FIFO,LIMIT And FREE/CHAIRMAN.
6.The unit has built-in high fidelty of capacitor sound head ,its sound   quanlity is clear and low noise.
7.The chairman unit can turn down the delegate unit for anytime by priority   button.
8.Its design patent of appearance.