Several SAM4s and Sharp have quite a few models of cash registers with credit card reader. However please keep in mind with a cash register with a credit card reader won't process credit cards all by itself. The card reader simply reads a card but does process it. The card reader needs to hand off the information to a device that processes the data. What most cash registers need is a Datacap Twin Tran device to complete the system. With a Datacap you can process credit cards and many brands of gift cards directly on your SAM4s or Sharp cash register.
Need some help sorting out what to buy you can call us at 1-800-863-2274 if you already own a cash register and datacap and need to have it re-programmed we can help with that too just keep in mind that is a service we charge for.