HOW IT WORKS
Many credit cards and drivers licenses have microchips, but do not have batteries, yet they still can transmit data over through the air. How is that possible? When the radio frequency waves from an RFID scanner reach the wave collecting antenna on a smart card it creates a small amount of electricity that powers up the microchip. Once the microchip has power, it starts sending your data out to RFID listening device(s).
X-ray of smart card showing receiving and transmitting antennas
To stop the microchip from sending data when you don’t want it to the THOR™ RFID Antenna Shield simply “pulls the plug” on the microchip by helping to block the RF waves from being used by the antenna on the card and preventing the microchip from powering up. Watch our video to see this in action.
Because each shield is made using a single plate of copper, multiple credit cards and your driver’s license can be “sandwiched” between two plates to help shield from both sides. From our testing you can sandwich approximately 6 cards between two plates and achieve excellent protection. If you have more cards than you can use a third shield in the middle to add protection to another 6 cards. You can think of Thor as almost an RFID "magnet" that captures the waves and does not let them reach the antenna. By designing THOR™ to be as slim as possible it hardly adds any thickness to your cards.
One THOR RFID card will provide some good protection from a straight on scan (line of sight).
FOR MAXIMUM PROTECTION USE:
3 to 6 credit/smart cards – USE 2 THOR SHIELDS (on the outside)
7 to 12 credit/smart cards – USE 3 THOR SHIELDS (max 6 cards between shields and no cards on outside)
13 to 18 credit cards – USE 4 THOR SHIELDS (max 6 cards between shields and no cards on outside)
Width - just slightly smaller than a credit card (2.120")
Length - just slightly smaller than a credit card (3.370")
Thickness - approx. 1/2 the thickness of a credit card (2 THOR SHIELDS = APPROX. THICKNESS OF 1 CREDIT CARD)