Asus X200MA - Manual (Page 23)

Notebook PC E-Manual 3
USB 3.0 port
This USB (Universal Serial Bus) 3.0 port provides a transfer rate
of up to  Gbit/s and is backward compatible to USB .0.
Air vents
The air vents allow cool air to enter and warm air to exit the
Notebook PC.
WARNING! Ensure that paper, books, clothing, cables, or other
objects do not block any of the air vents or else overheating may
occur.