X-Micro XBT-DG7X Manuel D'utilisation page 13

AV/HS Audio" at the Sound Playback section after being properly
connected, just select this option manually.
6.2.1 Button Functionality Under Music Mode
Play music, Pause
Stop music,Power off
Reverse, Previous Song Title.
Forward, Next Song Title.
Increase Volume (V+).
Decrease Volume (V-).
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