Card Reader Integration?

I was wondering if there is an existing application that allows for seamless integration between a card reader (to swipe your credit cards through) and ProductCart? 

I currently use authorize.net and have a card reader from them, and have an app from Authorize.net to use with the reader but I don't see an option in ProductCart itself to see if I can check out a customer from ProductCart via tablet with the attached card reader. 

Basically, I want to be able to use a card reader with my tablet and have a seamless solution from buying to capturing payment. I have been booked for shows/events with my business and would like this option rather than just use the reader with the payment gateway app and then have to readjust my inventory later.

Thanks,

-Kim