NXP Mifare Classic 4K Cards.

• CR80 card size (86mm x 54mm).
• Compatible with ISO 14443A readers.
• Operates at 13.56 MHz frequency.
• The 4k refers to 4,000-byte memory capacity.
• Typical read/write range of 10cm.
• High gloss finish.
• Blank white RFID cards for overprinting personalisation on desktop card printers.