Secure Entrances with Reliable rfid blocker card - Alibaba.com
About products and suppliers: rfid blocker card sets are computer-controlled cards situated at the entrances of buildings to ensure security..rfid blocker card devices enable only authorized person to enter into the safeguarded area. The. rfid blocker card can be swiped or waved in front of a reader, which then verifies the information before allowing access.
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