Note: Please notice that our RFID cards can't be compatible with UHF reader and encrypted readers, for example, the reader of following brands: HID, Indala, Cobra, APCiK, Paradox, Radio, Honeywell,etc. Please consult your technician to ensure your reader will support normal (non-encrypted) standard 125KHz RFID cards. Specifications: Pre-programmed with unique 18-digit ID number in each card (The first 10 digitals is ABA code, the last 8 digitals is wiegand code.) This RFID card is read only, can't been programmed Operation Frequency: 125KHz Chip: EM4100 compatible Chip Storage Capacity: 64bit Communication Protocol: ISO 18000-2 Compatible standard ID door access devices or ID reader Contactless transmission of data and supply energy Ideal for use in ID and access control With card ID printing Size: Standard Credit Card Size (CR-80)and Thickness (3.375" x 2.125", 30 mil thick) Material : PVC & ABS Operation Temperature : -40℉~185℉ Waterproof Package included: 200 x RFID Cards (Can't been programmed)