Nikon Z 9 Reference Manual page 820

Radio-controlled Advanced Wireless Lighting
Color Information Communication (flash)
Color Information Communication (LED light)
Auto FP high-speed sync
FV lock
Red-eye reduction
Camera modeling illumination
Unified flash control
Camera flash unit firmware update
1 Not available with spot metering.
2 Can also be selected via the flash unit.
3 q A/A mode selection is performed on the flash unit using custom
settings.
4 Choice of q A and A depends on the option selected with the master
flash.
5 Available only in i-TTL, q A, A, GN, and M flash-control modes.
6 Available only in i-TTL flash control mode or when the flash is configured
to emit monitor preflashes in q A or A flash control mode.
7 Firmware updates for the SB-910 and SB-900 can be performed from the
camera.
Compatible Flash Units
820
Supported features
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