Roland GO:MIXER PRO-X Audio Mixer for Smartphones - Manual (Page 12)

Connecting a Mic
MIC *1, 2, 3
HEADSET MIC
MIC *3
(*1) If you’re using a condenser mic that requires an external
power supply, set the [PHANTOM POWER] switch to
“48 V.”
(*2) If you need to supply phantom power when using an
iPhone or iPad, install batteries in this unit. (If batteries
are not installed, phantom power cannot be supplied
even if the [PHANTOM POWER] switch is set to “48 V.” In
this case, the POWER indicator blinks.)
If you’re using an Android smartphone, phantom power
can be supplied both when you’re using batteries and
when power is supplied from the smartphone.
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