How much do you pay for credit card fees per transaction? No idea? Let’s say your business uses a standard credit card processing company. You pay $0.15 per transaction, with 2000 transactions of $5 each. You just paid $300 to your credit processing company. What if you could cut that to $275? From Twitter’s co-founder comes a tiny payment tool designed to solve the problems of cost, mobility, speed, and reliability. This little gadget fits in the coin pocket of your jeans, and it deserves your attention.