If your card is contactless enabled, your card holds information within a chip. This chip also contains an antenna that picks up power from a signal sent out by a card reader. The card reader and contactless card are then able to communicate on a 13.56MHz radio wave signal when in close proximity.

HOW IT WORKS?

The RFID Blocking card works by drawing power from the scanner, and emitting a counter-signal to jam the communication. This protects the surrounding cards within a 5cm radius (roughly). 

It’s the same size as a standard credit card so will fit in any wallet. It is however slightly thicker, at 1.2mm vs 0.76mm of a normal card. This is due to the internal circuitry.

WHAT CARDS ARE VULNERABLE?

Any cards with the above symbol contain contactless technology. But this isn't limited to cards with this symbol. If you have tap and go key-card entry, this may contain your personal data which will use the same 13.56MHz as contactless. Also contactless enabled passports are now becoming more widespread, again offering more opportunity for data on you to be stolen.

WHAT CARDS/DEVICES DOES THE ATTENUO CARD BLOCK?

Any card working on 13.56MHz frequency. This includes, but is not limited to:

Credit Cards

Debit Cards

Identification Cards

Passports

Mobile Phone NFC

Key Cards/Entry Cards