bem wireless EXO-400 Guia Del Usuario página 10

Volume Control
1. On your EXO-400: Repeatedly press the VOLUME UP (+) button to
increase the volume incrementally or hold the VOLUME UP (+) button
to steadily increase the volume. Repeatedly press the VOLUME DOWN
(-) button to decrease the volume incrementally or hold the VOLUME
DOWN (-) button to steadily decrease the volume.
2. On your device: Adjust the volume of your music as you normally would.
NOTE:
When maximum volume is reached, the VOLUME UP (+) button will
no longer increase the volume. If the VOLUME DOWN (-) button
is pressed often enough or held long enough, the speaker will stop
producing sound until the volume is increased again, but the speaker
will remain on.
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