FCC Warning PLAY/PAUSE MUSIC Short press the "MFB" button once. VOLUME UP Long press the "MFB" button on the right earbud (keep holding the "MFB" and the volume will keep going up, there will be a warning sound when you reach the maximum volume) VOLUME DOWN Long press the "MFB" button on the left earbud (keep holding the "MFB" and the volume will keep going down, there will be a warning sound when you reach the lowest volume) NEXT TRACK Double press "MFB" button on the right earbud.
