The license is for channel to work on CMS 2. The number of add-on channels supported: 1-6398. Price listed is for single channel add-on license.
CMS 2: The Central Management System managing unlimited NVR servers, providing Live view and Playback up to 64 channels; Smart Search; Export video; Event management; e-Map; free license for 2-channel ACTi NVR servers included.