8. MODE/SHIFT/TWS: Briefly press this button to toggle between USB/TF/LINE/Bluetooth
modes. Hold down this button to toggle between recording folder and MP3 folder; TWS
interconnection mode: open the two machines that need interconnection at the same time, and
simultaneously switch to Bluetooth mode. Pair one of them with the mobile phone's bluetooth to
play music. Hold down the TWS button on the machine to connect with another machine. After
successful connection, music will be played synchronously. Hold down the TWS button on the
machine to exit the interconnection mode.
9. Recording/DEL: Briefly press this button to enable recording. During recording, reverberation
should be tuned to the minimum. Hold down this button to delete a recorded file. Recording in
microphone mode is available.
10. LINE IN: External sound source input port (plug-and-play).
11. DC 9V recharging: DC 9V recharging port.
12. Power: Power switch.
13. Recharging indicator light: When recharger is connected, the red light turns on. When the device
is fully recharged, the light turns off.
14. Microphone input: Microphone input jack.
15. GUITAR IN: Electric guitar input port. When the equipment connection is used for electric
guitar, please close the reverb function.
16. MIC.DELAY: Microphone delay control knob.
17. Reverberation: Microphone reverberation control knob.
18. Microphone volume: Microphone volume control knob.
19. GT.VOL: Guitar volume control knob.
20. TREBLE: Treble control knob.
21. BASS: Bass control knob.
22. LIGHT: Briefly press this button for light mode.
23. REPEAT: In USB/TF card reading mode, briefly press this button to select one of four playback
sequencing modes (All - play all tracks in sequence; RAND - play at random; ONE - repeat one
track; FOL - repeat all tracks in a folder).
24. Remote Control Receiver.