Roughly the size of a standard credit card, the Bluetooth-connected Coin features a small integrated black and white e-ink display, a single mode button, a two-year battery, and a magnetic stripe that can pretend to be any swappable card in your wallet. Using an iOS or Android App and an included compact dongle, users can swipe multiple debit, credit, even gift cards and then upload those account details onto the Coin. And with the card’s single mode button and basic display, they can then toggle through which payment card they’d like to use, and then swipe it through a store’s standard card reader.