It blocks RFID, NFC, Contactless, Bluetooth of radio frequencies 20Khz, 100Khz, 125Khz/134Khz, 13.56Mhz signals. This material is used to produce RFIDsecur™ Contactless Blocking Card which is specifically designed to protect your card when placed with your card, either in front or behind it. It can be used in an ID card holder case, wallet ...
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