By looking at the camera packaging box or instructions, by scanning the barcode on the camera, by connecting the computer to the camera.

1. By looking at the camera package or manual, the device number and port number will be marked on the camera package or manual.

2. Inquire by scanning the barcode on the camera: the barcode on the camera contains the device number and port number.

3. Check by connecting the computer and the camera: after the connection is successful, the computer will display the camera ID number, that is, the camera port number.