player still cannot be turned on, check that the
remaining amount of the player battery is sufficient to
turn on.
4. Return
"<" : return back to last menu.
" " : return back to main menu.
5. Volume adjustment
"Volume+" :to turn up the volume.
"Volume-" :to turn down the volume.
Note: In the screen-locked state, the volume can also be
adjusted directly.
6. Introduction of touch gestures
In the Main interface, swipe left and right to switch the
main interface;
In the File list or Menu list, swipe up/down to scroll
up/down the list.