By entering the license key in the Surveillance Station user interface, you can use other monitoring devices on your synology product set up and manage. License packages for 4 or 8 monitoring devices have a single license key, with which you can activate 4 or 8 monitoring devices. In most cases, IP cameras, I/O modules and access controller, only one license per device and transaction devices two licenses per device. However, there are some cameras, for the other accounting methods. For more information, see the following section.The maximum number of supported by each synology product monitoring devices, please refer to the specifications by the individual models.Synology Surveillance Station offers various payment methods for certain cameras, like Panorama, more lenses cameras and video server for analog cameras.This text is machine translated.