*Latest digital design.
*With microphone ,speaking button and indicator lamp that can show and control the state of speech.
*Whole metal microphone shell .
*With a microphone unit connecting cable.
*Single projection; With Anti‐gas sonic boom and wind shield
*With Chairman priority key;could shut all the delegate unit.
*The chairman unit can be placed in any position in loop.
*The chairman unit is unrestricted by the limiting function.
*The chairman unit quantity is unrestricted in the loop.
*High sensitivity microphone.
*The power for units is supplied by the master controller at 9 safe voltage.
*Hand‐in‐hand connection method.
*With a microphone unit connecting cable 2.1m, 8P core line, convenient installation can increase efficiency.