Nikon Z 8 - MIC Jack Plug-In Power

Mic Jack Plug-in Power
G button
U1video recording menu
The camera does not provide power to external microphones when [OFF] is selected.
To prevent noise from interference generated by the power supply, we recommend turning plug-in
power [OFF] when using microphones that do not require plug-in power.
For information on whether your microphone requires plug-in power, consult the manufacturer.
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Mic Jack Plug-in Power