The license is for non-ACTi camera to work on NVR 3 Standard. No. of add-on channels supported: 1-63. Price listed is for single channel add-on license.NVR 3 Standard: The software NVR with support up to 64 cameras or video encoders; Export video; Event management; free license for 16-channel ACTi and 1-channel third-party video devices included