NSYS USB KEY is a HID device based on a standard USB interface, which does not need drivers and can be used with all operating systems - Windows, Linux, Mac OS, etc. This makes it easy to use and very low cost.
Each NSYS USB KEY device contains a globally unique hardware identifier for developers.
The HID is the unchangeable ID that is written to the device during manufacturing. Another User ID is also provided to developers to distinguish between different clients.