The license is for non-ACTi camera to work on NVR 3 Enterprise. The number of add-on channels supported: 1-199 (NVR 3 Enterprise, INR-420), 1-63 (INR-320, INR-330). Price listed is for single channel add-on license.
NVR 3 Enterprise: The software NVR with support up to 200 cameras or video encoders; Smart Search; Export video; Event management; e-Map; free license for 16-channel ACTi and 1-channel third-party video devices included