Asus S1 - Manual (Page 17)

LED projector E-Manual 17
Focus ring
The focus ring allows you to adjust the image focus of your LED
projector.
Air vents
The air vents allow cool air to enter and warm air to exit the
LED projector.
WARNING! Ensure that paper, books, clothing, cables, or other
objects do not block any of the air vents or else overheating
may occur.
Right side