HOLLICY SX1888 Assembly/Disassembly Manual page 13

2. Operating(function reference diagram)
MP3/MP4
player
(optional)
MP3 Optional
LCD display
MP3
Next/volume
reduction
charging
port
Music Music Music
Play/pause
lights
switch
power
on / off
Music Music
Previous/volume
increase
11
pedal
switch
gear switch
inner pedal
outer pedal
Big memory
Small menory
Model