4 PCS EM4100 Proximity ID Cards RFID 125Khz for Home Door Key Access

4 PCS EM4100 Proximity ID Cards RFID 125Khz for Home Door Key Access Control. Condition is New. Shipped with USPS First Class. New 4pcs 125 KHz RFID Cards EM4100 TK4100 Proximity ID Cards for Access Control Description: These 125khz RFID Proximity ID cards are widely applied in access control system and related applications. Each ID card has an unique digit ID number (This 125khz RFID card is read only and not rewritable.)