The P.o.S of Odoo 10 doesn't give me the search engine as the default selection.
So, I have to click on the search engine for each order and scan product(s)  with the scanner.

And i will have to clear it and click on it again if the barcode scanned is wrong. It's really not usufull for a PoS.

Technical specifications:

Odoo 10
Firefox and Chrome browser, same problem.