Comes with dual-sided slot storage for up to 6 cards (including business cards, credit cards, driver's license, cash bills, receipts metro or train passes, ID) and keeps them firmly in place to avoid falling out. RFID-Blocking secure design - equipped with advanced RFID Secure technology to give your cards, valuable data and identity full protection and minimize your information being stolen by electronic pickpockets or handed. Fits onto most smartphones and cases 2.5 inches (6.4 cm) wide or larger.