* Support 16 zones, group paging button.

* System max support 32 remote paging microphones.

* Microphone support anti-misoperation plug.

* Support line audio input, and input/output volume is adjustable.

* Paging priority can be set by software.

* Support 24 DC power supply.

* Remote MIC/Controller has 2 cascade interfaces, 1 in and 1 out.

* Optional paging to the main controller or extension controller.