5.
Volume Down
* press to decrease volume.
6.
Micro SD card slot
* expand the storage of the device, maximum support 512g
TF/Micro-SD card.
7.
USB-C & OTG Port
* used for charging and file transfer.
8.
Back
* click to come back to the previous page.
9.
Play/Pause
* starts/pauses the playing music.
10.
Next/Fast-forward
* during music playback, short press to switch the next song; hold
to fast forward.
11.
Toggle Key
* during the music playback, press to toggle lyrics display or album
cover.
12.
Previous/Rewind
* during music playback, short press to switch the previous song;
hold to fast backward.
13.
Reset button
* short press reset button to restart the device when the player is
freezes.