1. Music Speech Button2. Microphone Volume3. Auxillary Volume4. MP3 Volume5. Echo Control6. Tone Control7. Master Volume Control8. Microphone Input Jack9. Auxilliary Inputs, L & R,single 3.5mm frommobile device10. Audio Line Out, L & R11. Voice Priority Switch12. Power Switch13. DC Power Input JackPA Control SectionPOWERDC 12V/6A18V/3.3AMIC IN AUX INCHGLINE OUTONOFFPOWERMIC VOL . AUX VOL. MASTERMAXMINTONEHILOECHOMAXMINMP3 VOLMAXMINMAXMINMAXMINSPEECHMUSICVOICEPRIORITYONL LR R765432113121110988