Asus PN63-S1 Series User Manual page 13

Right view
Air vents (intake vent)
The air vents allow cooler air to enter your Mini PC chassis.
IMPORTANT: For an optimum heat dissipation and
air ventilation, ensure that the air vents are free
from obstructions.
Memory card slot (optional)
The built-in memory card reader enables your Mini PC to
read and write data to and from Micro SD cards.
ASUS Mini PC PN63-S1 Series 13