The option of adding a CD-R/RW and HDD Storage of up to 1.5 terabytes makes this system scalable enough to cope with even the largest needs. The Controller gives extra flexibility: not only can it control the 9 or 16-channel digital video recorder, but also up to 16 high speed domes. Images from colour, day/night cameras as well as domes can be output to the standard monitor and a spot monitor can be attached for the output of surveillance images from a selected camera.