"Launched in May 2017, the Fuze Card is a data storage device that looks like a regular credit card but can hold account data for up to 30 credit cards. The Fuze Card displays no credit card number on either side, instead relying on a small display screen on the front that cardholders can use to change which stored card is to be used to complete a transaction."
Secret Service: Theft Rings Turn to Fuze Cards