Proximity Smart Cards Chip: MF1S50Operating Frequency: 13.56MHzStorage Capacity: 1K Byet,16 districts,each district two passwordsRead Distance: 8-10cmCard Life: More than 100 000 times Chip: MF1S50 Operating Frequency: 13.56MHz Storage Capacity: 1K Byet,16 districts,each district two passwords Read Distance: 8-10cm Card Life: More than 100 000 times Data Retention Time: 10 years Typical Applications: patrol,attendance, access control systems,business card, bus card,highway Protocol: ISO14443A Model Number: 100CardIC color:White Material:PVC size:. 85.5 x 54 x 0.84mm Package Contents: 100 x card Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm.