Inside the KABAA :

There are three pillars inside
There is a small table on the side to put items like perfume and incense burners.
There are two lantern-type lamps hanging from a cross beam near the ceiling
There are no electric lights inside
The interior walls are clad with marble half-way to the roof.
The entire floor is of marble except for a small portion which is called "Rukhamat Humra".
Tablets with Qur'anic inscriptions are inset in the marble.
The top part of the walls is covered with a green cloth decorated with gold embroidered Qur'anic verses.
There are no windows inside
There is only one door
The space can accommodate about 50 people