13.56MHZ MIFARE Proximity Card is a very thin, truly credit card thickness of proximity passive card. It has very flat surface to print any photo ID directly on both sides of card with a direct image or thermal transfer printers. Works in 13.56MHz RF range. Features:- Chip: MIFARE 1K S50 Protocol: ISO14443A Frequency: 13.56MHz Function: Read and Write Memory: 1k byte Color: White Size: 85.5*54mm(CR80) Thickness: 0.8mm Material: PVC