A must have plugin for people who are serious about selling online!
With the help of this add module you canadd an unique identifier for each distinct product or download that can be purchased via your opencart system.
Three places where this will add the SKU functionality:
1. Product option page
2. Sale order page
3. In the invoice along with the product name.
In technical Terms… This VQmod module for opencart allows you to add a unique SKU for each option.
Make sure you check the screenshots for further clarity.