Roland GO:MIXER PRO-X Owner's Manual page 21

(*1) Don't operate the [BATTERY] switch while a smartphone
is connected. Doing so might destabilize the
smartphone's operation.
* If operating on batteries, the POWER indicator
blinks when the batteries run low. If you
continue using the unit in this state, the power
automatically turns off after approximately one
minute. Replace the battery as soon as possible.
* If you handle batteries improperly, you risk
explosion and fluid leakage. Make sure that
you carefully observe all of the items related to
batteries that are listed in leaflet "USING THE
UNIT SAFELY" and "IMPORTANT NOTES. "
MEMO
5 If you're supplying power from the smartphone
to this unit, set the [BATTERY] switch to the "OFF"
position. In this case, use the included USB cable.
5 The smartphone cannot be recharged from this
unit.
4.
Set the [BATTERY]
switch to the "ON"
position. *1
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