1.Chip: MIFARE Classic 4K Chip <br> 2.Function: Read/Write protect by password,UID can’t change,uid is not rewritable<br> 3.Memory: 4K Byte<br> 4.Card dimensions: 85.5 x 54mm(ISO Credit Card Size) <br> 5.Thickness: 0.88mm. <br> 6.Material: PVC<br> 7.Surface: lamination (glossy)<br> 8.Frequency: 13.56MHz<br> 9.RF Protocol: ISO 14443A<br> 10.Data storage time: minimum 10 years<br> 11.Each card is well packed with a clear plastic foil<br> 12.Blank white card, printable on most desktop photo ID card printers, NOT FOR INKJET PRINTER<br> 13.Can work with RC522 and PN532<br> 14.Package: 10pcs per Bag<br> 15.Works with KABA,SAFLOK,MIWA AND ONITY LOCKS etc, but NOT work with HID,Salto and Assa Abloy RFID Locks, also NOT compatible with Amiibo and 125KHz EM Readers.<br> MIFARE and MIFARE Classic are trademarks of NXP B.V.