What is RFID? RFID (radio frequency identification) is a growing technology that uses radio waves to read and transfer information between devices. Personal cards that currently use this technology include credit cards, transit payment cards, and identification cards such as enhanced drivers licenses. Why use a RFID wallet? Cards with RFID is vulnerable to scans by nearby person with RFID readers to capture information without ever physically coming in contact (similar to scanning a barcode). RFID wallets protect cards from unknown scans with the unique protective layering crafted inside the wallet lining. Specification: Material: Genuine Leather Colour: Brown Closure: Zipper Size: About 5.12inch(L) x 3.54inchW) x 0.98inch(H) HIGH CAPACITY 12 Card Slots, Cash Pocket, Zipper Pocket, Photo Holder, Slot Pocket. Can hold all you need.