I'm surprised at the responses to this post as non of them are even close. This has nothing to do with PayPal or software for on-line transactions.
This is a gizmo that plugs into to a cell phone to take "card present" transactions. It's a CC slider for people that don't have a merchant account and want to accept CC payments while outside the office. Flea markets, art shows, plumbers and repair people can use this device to swipe credit cards and collect payments from customers.