Asus Mini PC PN51 Manuel De L'utilisateur page 25

Connect the USB cable from keyboard or mouse
You can connect generally any USB keyboard and mouse to your Mini PC.
You can also connect a USB dongle for a wireless keyboard and mouse set.
To connect a keyboard and mouse to your Mini PC:
Connect the USB cable from your keyboard and mouse to any of the USB
ports of your Mini PC.
NOTE: The keyboard varies with country or region.
PN Series 25