Devialet 440 Pro Dual Manual page 31

3 – Once your configuration has been saved
to the SD card, reinsert it into the card
reader of your Expert.
4 - The new configuration will be read
automatically by your Expert upon insertion
of the SD card. There is no need to restart
the device.
Leave the card in the card reader.
If you wish to restore the default
configuration, simply remove the SD card
and restart.
You may use multiple SD cards if you wish
to quickly change from one configuration
to another.
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