Sunstech SKYBT Guide D'utilisation page 9

4. MENU
5. PLAY/PAUSE
6. VOLUME <+>
7. VOLUME <->
8. ON/OFF
9. TF CARD
10. USB
11. EARPHONE
Short press enters functionary submenu
Short press means play or pause. For the
functionary menu, it serves as the
confirmation button
Short press means turning up the volume
and long press turning up faster
Short press means turning down the
volume and long press turning down
faster
Long press means turning on/off
Insert TF card
Connect USB to transfer data/charge
Insert earphone with the specification of
3.5mm