Even a small store needs a credit card machine to accommodate its customers. People tend to rely on their credit cards rather than pay in cash because of many reasons, one of them is it is very handy and it is not vey hot to the eyes of the criminals.
Now, there are portable credit card machine that you can buy even online for the safer and easiest way to serve your customers. It is definitely an answer to the growing needs of the public and they feel safer and comfortable paying for it. I think it can also accept debit payments anywhere just lie the comfy of it all.