Hardware Limits

Are there any hardware limits with Aronium.
i.e.  I would like to connect this to a scanner and a drawer I have and and then a printer etc.
( Maybe 2 printers. 1 for receipts and one for bar codes etc)

Or would a standard Windows Printer of A4 sizing be better with labels paper for barcodes?
How small can they be printed?

Thanks

Pete