Ubiquiti UniFi Security Gateway XG-8 - Back Panel

Back Panel
Fans
AC/DC
PSU Module
PSU 2
Module Bay
The USG-XG-8 includes one hot-swappable AC/DC PSU
module. An optional AC/DC PSU module can be installed in
the PSU 2 Module Bay.
You also have the option to use a DC/DC PowerModule
™
,
model RPS-DC-100W (sold separately).
Note: There are ventilation holes on the sides of the UniFi
Security Gateway XG.