Holds Up To 7 Credit Cards. Eject Cards By Pulling Release Tab Located On Bottom Of Holder. Emergency Release Located On Bottom Of Holder. Place Your Credit Cards In Holder To Prevent Cyber Hackers From Stealing Your Identity. Prevents Data Transfer Between The Wallet And Reader. Works With Any Contactless Chip Card. Cards That Are Swiped Do Not Send RFID Signals And Will Not Be Protected By An RFID Blocker.