6 sets of external signal inputs, three MIC input channels, of which two can be used as call microphones, 3 sets of external inputs, supporting stereo and mono audio input, supporting telephone paging function, and each set of input volume can be adjusted separately;

Prompt and alarm sound functions;

7-segment EQ and master volume control;

5-zone broadcast selection switch;

Built in media player, Bluetooth, FM, MP3, USB, SD media playback function;

Support infrared control function;

Fixed resistance/constant voltage dual-mode output, supporting 1 set of 4 ohms or 70V100V partitioned output;