This kind of contactless card blocker comes in the standard 85.6mm x 54mm credit card size for cards, and 122*82mm for passport, it is just a little thicker than a regular credit card.It is special that when your cards are scanned,the LED light equipped within the cards will flash to remind you.It's designed for protecting to personal information stored on 13.56Mhz frequency contactless cards such as credit cards,debit cards,ID cards,passport.
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RFID blocking cards with Led
RFID passport protect cards