Knob: Adjusts master volume  
Unit connection: Dedicated 8-core cable (aviation-grade locking)  
Input: 1x RCA audio input  
Output: 1x RCA/XLR audio output  
3x DIN8P unit ports  
EQ button: On/off  
Modes: Normal, FIFO, VOICE  
Speaker limit buttons: 1/2/4/6  
ID setting: On/off  
Control interface: RS-232 (9-pin D-sub female)  
Power: AC100V~240V (with power button)