Previous or Next song
Previous song: Turn the MFB button clockwise and
hold about 1 second, and then realese the button to
go to the previouse song. (Some mobile
phones/music players only replay the playing
music )
Next song: Turn the MFB button anticlockwise and
hold about 1 second, and then release the button to
go to the next song.
Adjusting the Volume
Turning the MFB button clockwise or anticlockwise
will adjust the speaker volume during an outgoing
call (mobile phone call or intercom call). Each twise
will adjust volume by one step until maximum or
minimum volume is reached.
Battery Check
Rotate the MFB button and hold 1 second, you will
hear the prompt of the battery capacity.
Low Battery Warning
When the battery is low, the red LED will blink each
5 seconds and you will hear a voice prompt saying
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