Product Name: 13.56MHz Printing Smart Card NFC Signals Card Blocking RFID Data Transmission Mode: / Frequency: High Frequency Power Supply Mode: Passive Card Structure: COB Module Label Category: Passive Read-Write Method: Non-Contact Type Material: PVC Type: Smart Card Function: Security Shield Distance: Normally The Range 4cm, Diameter 2cm. Protection: All Kinds Cards with 13.56 MHz. Such as Credit Car Waterproof: Yes Product Application Field: Information Security Protection Size: 85.5*54*0.9mm/1.2mm Card Type: Blocking Card Operating Temperature: -50