125KHz RFID Key Fobs, ABS EM ID Proximity Key Fobs Access Control Key Tags for Office Factory Doors 50 Pack Made of high-quality ABS material, these RFID key fobs are ensuring long-term reliability in harsh environments. Standard 125Khz RFID Key Fobs, compatible with standard access devices or ID reader. Pre-programmed with unique 18-digit ID number on each card. (The first 10 digits are printed on the card). Read only, can't been programmed. Works with 125KHz RFID systems for access control, public transport, parking, ID authentication, attendance tracking, payment cards, and event tickets. Cannot support HID. Pack of 50pcs.