Nikon D3300 - Manual (Page 282)

262 B The Setup Menu: Camera Setup
View the current camera firmware version.
A Using Eye-Fi Cards in Ad Hoc Mode
Additional time may be required when connecting using Eye-Fi cards
that support ad hoc mode. Select longer values for Auto off timers >
Standby timer in the setup menu (
0 245).
Firmware Version
G button
➜ B setup menu