Tasmanian Tiger Card Holder RFID Black. Additional information: With the CRYPTALLOY foil Tasmanian Tiger uses a film that offers maximum shielding against relevant frequencies (from 100 kHz to 4 GHz; this means low high and ultrahigh frequency range) and due to a frequency shift disturbs any radio communication. This was tested and certified by the TV Saarland. As the manufacturer Kryptonic Technologies has confirmed the required processing of the foil in all of Tasmanian Tigers RIFD products. Specifications for Tasmanian Tiger Card Holder RFID: Manufacturer: Tasmanian Tiger Fabric/Material: T-Square Rip/CRYPTALLOY Weight: 0.5 oz Features of Tasmanian Tiger Card Holder RFID Best RFID scan protection with TV certified RFID blocking material CRYPTALLOY Shielding against all frequencies and can be used for all cards Space for at least four cards Elastic strap closure Package Contents: Tasmanian Tiger Card Holder RFID Tasmanian Tiger TT-7855-040: Card Holder RFID Black