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Before you can reorder access cards, replace a lost fob, or add new users, you need to answer one basic question: Does your system run on 125 kHz or 13.56 MHz? This guide explains the difference between low frequency and high frequency RFID credentials, shows you several practical ways to tell which one you have, and covers when it makes sense to upgrade from prox to smart card.
Get the latest access control industry updates. Learn more about RFID door entry cards and proximity key fobs. Browse our extensive article library of security system and building access information.
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