•          Chairman unit with built-in loudspeaker ,two 3.5mm stereo headphone sockets and red (LED) indicator on the unit base and microphone head. When the microphone is on, the red indicators will on.

•          Built-in loudspeaker will be automatically muted when the microphone is on in order to avoid the feedback.. The chairman unit has the priority function to overrule /mute all active microphones of delegate units in the system and keeps the chairman unit on for as long as the button is pressed.

•          The chairman unit has the same function as the delegate unit with the exception of a priority button..

•          Mains voltage is 100—240Vac.±10%，50/60HZ.

•          7-pole circular female socket for loop through connection to the next unit. 2M flying lead connection cable with sturdy moulded 7-pole circular male connector for connection to the previous unit or SC-600.The cable is shielding conductor in order to avoid the interference of the electromagnetic wave.

•          The chairman unit isn’t be restricted by the controller, and can be in series at any position of the system..If the systems with several chairman units , these chairman units are independently ,they can’t be controlled by the controller.

•          Hand in hand connection .