Package includes: 12pcs 125KHz T5577 RFID CARD. Standard 125Khz ID Card,Support ID125khz HID125khz card duplication | The size same as a credit card, CR80 30 mil. The chip type: T5577.Thickness: 1.8mm. material: PVC | Applications: Hotel key card, Access control systems, Time attendance system, packing card | T5577 Chip: It doesn't have pre-programmed id number,so need to write the id on it before you read | Blank white card, printable by sublimation printer, but can't support inkjet printer