Your device's unique serial number is stored in its microprocessor memory. Here is how to obtain the serial number of your device:
1) Connect your device to Isaac software (if you haven't installed Isaac on your computer, here is where you find it:
https://velocomp.com/isaac-software-installation/
2) In the Isaac command menu, go to "Device/SN and FW Version"
3) Your device's serial number and firmware version will appear in the new window.