Mixcder X1 Pro Guia Del Usuario página 8

Last track
When playing music, press and hold MFB button of the left earbud
for 2 seconds to switch to next track.
Play/Stop
When playing music, press MFB button of either earbud to
play/stop.
Volume down
When playing music, double press MFB button of the left earbud to
turn down the volume.
Keep press 2S
Single press
Double press
EN-7