Various varieties of proximity key fobs, proximity key tabs and proximity cards are present in the market that work with the feature of contactless technology. To name few are, HID proximity cards, AWID proximity cards, indala proximity card, kantech proximity cards, etc. Broadly proximity cards are of two types, passive and active cards. Passive proximity cards uses RF signals and have low read range and are predominantly used by organizations, in libraries, public transit system, etc. On the other hand, active proximity cards or vicinity cards make use of lithium battery fitted internally. They have high read range than passive cards and can read from a distance of 2 meters. As these are dependent on batteries, they are required to be replaced. Pros and cons of Proximity Cards There are various benefits of using proximity card as by its use access control is granted. Not only proximity cards provide better access control, but also great security measures. As these proximity card are provided to all the employees, these are not very expensive, but more than the expense it increases the safety measures. These low price proximity card are also used for monitoring the attendance of employees as audit reports can be easily generated by accessing proximity card for entry and exit. Moreover the proximity cards are compatible with multiple proximity readers and thus it made it more flexible to use.
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