Asus UX31LA - Manual (Page 15)

Notebook PC E-Manual 1
Bottom
NOTE: The bottom side may vary in appearance depending on your
model.
WARNING! The bottom of the Notebook PC can get warm to hot while in
use or while charging the battery pack. When working on your Notebook
PC, do not place it on surfaces that can block the vents.
IMPORTANT! Battery time varies by usage and by the specifications for
this Notebook PC. The battery pack cannot be disassembled.
Audio speakers
This Notebook PC uses SonicMaster technology developed in
collaboration with Bang & Olufsen ICEPower® to provide hi-fi
sound quality, with richer bass sounds, straight from the built-in
audio speakers.