Description of Panel Function
1. LED Digital Display
2. Main Features (Line/Bluetooth/FM
mode switch, Record, TWS, etc.)
3. USB or TF Card Slot
4. Mic Volume Control
5. 3.5mm Audio Input
6. Treble Control
(for music only)
7. Bass Control
(for music only)
8. Musical Instrument Volume Control
9. Main Volume Control
10. Echo Control
(for mic only)
11. Charging Indicator
12. Wired Mic Input
13. Musical Instrument Input (for most electronic musical instrument: piano/electronic
guitar/electronic piano/electronic drum and so on)
14. 15V DC Input
(for power adapter)
15. External 12V DC Input
(for storage battery)
16. LED Light Button
17. Power Button
