100 PCS 125Khz RFID Proximity ID Cards with Slot Hole Punch Key Token Tag
Note: These are 125kHz RFID Cards with Slot Holes. Incompatible with other frequencies like 13.56MHz. Casing Material: PVC Plastic. Read only. Not re-writable. You canNOT re-program them. The 10-digit number is printed on the card.