The VID FFFF is a special value that indicates a device is using a reserved or undefined vendor ID. This can be due to various reasons, such as the device being a prototype, a custom-built product, or a device that hasn't been registered with the USB-IF (USB Implementers Forum). The PID 1201, on the other hand, is a relatively common product ID, but when paired with VID FFFF, it becomes a unique identifier.
