Balanced/unbalanced 16 channel combo input, supports microphone or line input, with independent gain input control knob 

Camera PTZ control port (support VISCA/PELCO_D/P protocol) for conference camera automatic tracking 

Four camera inputs, automatic video output signal switch and multi-position video without dead-corner suits for video conferencing with multiple participants 

3 units can be combined and used together, user can increase the quantity of host unit according to the actual application 

With speak restriction mode, FIFO, the simultaneous speaking number can be set to effectively reduce the howling and enhance the conference quality 

Intelligent voice control function, when the voice is detected and exceeds the set threshold, the microphone will turn on automatically 

Chairman channel is always defaulted as channel 1, which is not restricted by the speech mode 

Provided with switchable 48V phantom power supply