KNOXX Wallets - RFID Secure Bifold, Transparent ID Holder, 2 Currency Slots, Leather, Gift Box Included WHAT IS RFID? - RFID is the use of radio waves between devices to transfer data. Credit cards, payment cards, and driver's licenses all use RFID PREMIUM FUNCTIONALITY: Our RFID wallet not only offers security, it's also very functional. Perfect everyday wallet with plenty of room to carry money, ID, and several cards,Top quality!Dimensions = 4.5" 3.5" 0.5".Double bill compartment, 7 credit card slots, and leather-framed ID window. ENHANCES PERSONAL SECURITY: We use top RFID technology to block RFID signals used to electronically scan your wallet as someone passes by unnoticed. This keeps your vital information in driver license, debit cards and credit cards from being stolen. Blocks 13.5 MHz RFID credit card chip signals. SATISFACTION GUARANTEE: We know you'll love our wallet, that's why if you aren't 100% satisfied we will provide you with a refund or a free replacement.