Dear SMOK Customer, you may have seen the 4 boxes on SMOK website under ”Product Verification”.
This is used to check the authentication of product with 16-digit label.
For the latest product serial label, you can directly download Vaping tour https://m.vapingtour.com and scan Code A + Code B to register the vaporizer with SMOK.
How to register: https://www.smoktech.com/new-anti-counterfeiting-system
As you can see, serial label is very important, please keep it safe in case you need the after-sales service someday.