Chip: MF1S50 Operating Frequency: 13.56MHz Storage Capacity: 1K Byte, 16 districts, each district two passwords Read Distance: 8-10cm Card Lifespan: More than 100,000 Data Storage Time: 10 years Typical Applications: attendance, access control, business cards, bus cards, highway Protocol: ISO14443A Model Number: 100CardIC Color: White Material: PVC Size: 85.5 x 54 x 0.84 mm Package Contents: 100 x Cards 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 to differ slightly from the real one. The measurement allowed error is +/- 1-3 cm. Your satisfaction is our top priority. We will provide you with the best service. If you find any problems after receiving the product, such as damage, incorrect quantity, etc., please contact us immediately and we will provide you with the best solution!