10pcs RFID Shielded Sleeve Card Blocking 13.56MHz IC Card NFC Security Card Prevent Unauthorized

Description 10pcs RFID Shielded Sleeve Card Blocking 13 56MHz IC Card Protection NFC Security Card Prevent Unauthorized ScanningNFC security card sets prevent unauthorized scanning of your card Elimination of electromagnetic EMI interference shielding of electromagnetic radiation on the IC card damage Both airtight every light anti static anti RF energy Features RFID Security card can help users prevents strangers reading your IC banking card ID card and transit card and RFID smart cards the complete elimination of payment card wallet of NFC applications such as bank cards bus cards were fraudulent risks such as leakage of personal information Card sets with conductor layers in the body so when you put the card into the holding Chamber outer conductor can isolate the bank card to make NFC devices even closer to contactless RFID cards card in protective sleeve you cant get the card information effectively guarantee the information security RFID Security card sets is based on Farah subsection cage principle design of NFC RFID communications is a radio communications technology its signal transmission using has electromagnetic make variable field this electric magnetic field spread in meet Farah subsection cage principle of protection card sets surface will was transparent passed to card sets of another side and in protection card sets of capacity reset cavity was is detection not to any make variable of electric magnetic field because according to Farah