Chumia 200 Pack 125 KHZ Proximity RFID Cards 1.8 mm Thickened Read Only for Access Control, Compatible with Em4100/TK4100, Standard Credit Card Size

["Bulk Packaging: the 200-pack bundle provides sufficient quantity for large-scale access control needs applied in businesses, schools, apartments, and parking systems; This RFID card offers a cost-effective solution for multi-user access management","Frequency Compatibility: these 125 kHz RFID cards operate at a 125 kHz frequency, are compatible with EM4100 and TK4100 chips, and work with non-encrypted 125 kHz RFID readers; It is not applied with UHF or encrypted readers; If you are unsure, please consult your technician to ensure that your card reader supports ordinary (unencrypted) standard 125KHz RFID cards","Standard Size: these blank RFID cards follow the CR 80 standard credit card size, 3.37 x 2.13 inches/8.56 x 5.4 cm, with a pre-punched slot hole for easy carrying and attachment to lanyards or badge holders; It fits standard card readers and access control systems","Sturdy Material: made of PVC plastic, this RFID card features a 1.8 mm thickened design with waterproof performance; The sturdy structure maintains performance in long-term outdoor and indoor use","Read-only Function: designed as read-only, these 125 kHz RFID cards store fixed identification data, preventing unauthorized data modification and ensuring stable access control operation; It is ideal for scenarios requiring consistent ID recognition"]