EAN is helpful to maintain inventory system of products and management knows stock level by product EAN, Like the product inventory product options are also need to track, in default OpenCart there is no way for that, thus product option EAN module comes. Using product option EAN, store owner can add/edit EAN for each product options and maintain inventory for options too. EAN will help to easily locate and pick up the right options for products. Product option EAN will show on almost all places where product options show, like product page, mini cart, cart page, checkout page, order history page, admin order view/edit page. EAN is recording when order get placed with product options.