Adafruit Holographic RFID Blocking Card Holders (10-pack)

Holographic Vertical RFID Blocking Card Sleeves safeguard all your 13.56MHz RFID-enabled cards, including credit cards, bank cards, and photo IDs, from identity theft. Designed to outperform the makeshift aluminum foil method, these sleeves effectively block unauthorized RFID readers from accessing your card's sensitive information.Measuring 65mm x 90mm, each sleeve fits seamlessly in your wallet or purse. The pack of ten ensures you can share with a friend or replace a lost sleeve with ease. Note, these are not suitable for 125KHz blocking, typically used by door-access cards. Discover more about RFID/NFC products on the Adafruit Learning System.