Nikon Z9 Mirrorless Camera - Manual (Page 590)

590 1 The Video Recording Menu: Video Recording Options
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.
Press 1 or 3 to adjust headphone volume.
Mic Jack Plug-in Power
G button
U 1 video recording menu
Headphone Volume
G button U 1 video recording menu