Honeywell XENON 1902 - Manual (Page 171)

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UPC-E0 Expand
UPC-E Expand expands the UPC-E code to the 12 digit, UPC-A format.
Default = Off.
UPC-E0 Addenda Required
When Required is scanned, the scanner will only read UPC-E bar codes
that have addenda.
Default = Not Required.
UPC-E0 Addenda Separator
When this feature is On, there is a space between the data from the bar
code and the data from the addenda. When turned Off, there is no space.
Default = On.
On
* Off
* Not Required
Required
Off
* On