I represent a franchise group in the USA. The group has proprietary POS software which does not include a payment module. The developer of that software (I am not the developer - just doing the legwork) wants something he can connect to so his retail card present/swiping software will populate the dollar amount and submit the transaction to the processor. The merchants are seasonal. They move into a temporary facility for a short period of time, set up laptops, plug in MagTek USB card readers and depend on WiFi for connectivity. They also use USB printers to get a quick receipt (not interested in mobile devices, handing it over for a signature and typing an email address for receipts). Customers are in line sometime for 30 minutes - one hour, so speed is critical.
