Beyerdynamic Xelento Remote Manual page 11

Xelento remote – In-Ear Headphones
Volume adjustment on smartphones and tablets
With compatible smartphones and tablets, the volume can
be adjusted via the upper and lower button on the remote
control. Press the upper button briefly to increase the
volume by one level. Press the lower button briefly to
decrease the volume by one level.
Please note that not every smartphone or tablet features
this function.
On smartphones and tablets with an Android system, it is
necessary that the playback device supports the so-called
https://source.android.com/devices/accessories/headset/plug-headset-spec
Wired Audio Headset Specification:
Please contact the smartphone or tablet manufacturer, if
necessary.
Increase volume level
Decrease volume level
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