Features: 1.Sensitive sensing, 0.8?3.9in sensing distance (depending on the card reader), 0.1 second sensing time. 2.Suitable for access control, time attendance, elevators, parking lots, hotel door locks, etc. 3.Made of premium PVC material, waterproof and drop resistant, can cope with all kinds of environments. 4.Different from ordinary IC cards, it can repeatedly erase and write IC card number and sectors, 0 sectors and other sectors are fully open. 5.Compact size, light weight, easy to store and carry around for you. Total of 50pcs tag, fully meet your needs. Specification: Item Type: IC-CUID Key Tag_x000D_ Material: PVC_x000D_ Induction Distance: Approx. 2-10cm/0.8-3.9in (depending on the card reader)_x000D_ Working Frequency: 13.56MHZ_x000D_ Working Temperature: -40-55_x000D_ Application: Applicable to access control, hotel door locks, employee attendance, campus access control payment control, identification and security systems, parking lot access control payment, social security management, transportation payment, municipal and auxiliary service payment, etc._x000D_ Instruction:_x000D_ This key tag is different from ordinary IC cards, it can repeatedly erase and write IC card number and sectors, 0 sectors and other sectors are fully open. Use ordinary IC card to read and write successfully but cannot open the door, and there is no response when swiping the card, then you can use this CUID card PackageList: 50 x Key Tag