In this configuration the addition of the Controller gives extra flexibility to the system. 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. The DVR has a built-in 240GB hard disk, and there is the option to attach a CD-R/RW. With this configuration you have the building blocks for any surveillance/security system.