The inlets take in air to cool down the internal temperature.
Do not block or prevent the outflow of hot air. Doing so may cause the unit to malfunction.
Main Unit - Bottom
TOP
Inlets (at 3 points on the rear/bottom)
There are two inlets on the right and left sides at the rear of the unit.
Manual button for lens cover 
The lens cover can be opened when pressed down.
It is used for maintenance purposes. You can also make use of it when you need to open the lens cover urgently.
Feet
The height and angle of the projector can be adjusted by turning the foot. (0 to 5 mm) (LINK)
When the foot is removed, it can be used as the mounting holes for the ceiling mount bracket.