An EAN-13 barcode can be augmented with a two-
digit or five-digit add-on code to form a new one. In
the examples below, the part surrounded by blue
dotted line is an EAN-13 barcode while the part
circled by red dotted line is add-on code.
W106610
W106600
Enable 2-Digit Add-On Code
*Disable 2-Digit Add-On Code