1 2 3 4 8 5 9 6 10 7 11 12 13 14 15 AC INPUT 1. USB Port STOP 2. SD Port 3. Control button of Mp3 MODE /BT 4. MIC input with XLR and 6.35mm connectors 5. MIC level EQ 6. Stereo input and output with RCA 7. Button to switch between line and USB/SD 8. Graphic equalizer 9. Echo effect 10. Master knob to adjust the volume of speaker 11. Line/MP3 level Technical specification 1. 2-way amplified plastic loudspeaker 2. Woofer: 15” 30oz, 38mm VC 3. Tweeter: 25mm driver, 4oz 4.