* With operation number input keys and LED display.

* Capacity of manage 30 paging selectors T-6212(A), up to 300 zones.

* Max remote control distance up to 1Km.

* With microphone volume control.

* RCA line input and output.

* Built-in chime and chime volume control.

* Max 16 microphone work together with RJ45 port in series connection.