Features: 1.Sensitive sensing, 0.8?3.9in sensing distance (depending on the card reader), 0.1 second sensing time. 2.Can be used for access control, time attendance, elevators, parking lots, hotel door locks, etc. 3.Using superior PVC material, waterproof and drop resistant, can cope with all kinds of environments. 4.Compact size, light weight, this card is easy to store and carry around with you. 5.Total of 50pcs access cards, which can completely meet your needs, practical and economical. Specification: Item Type: Proximity Card_x000D_ Material: PVC_x000D_ Uses: Access control, time attendance, elevator, parking lot_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. PackageList: 50 x Proximity Cards