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About product and suppliers:
        Alibaba.com offers 12,670 one card system products. About 3% of these are access control card, 2% are locks, and 1% are access control card reader. 

A wide variety of one card system options are available to you, such as free samples, paid samples. 

There are 12,670 one card system suppliers, mainly located in Asia. The top supplying country is China (Mainland), which supply 100% of one card system respectively. 

One card system products are most popular in North America, Western Europe, and Domestic Market. 

You can ensure product safety by selecting from certified suppliers, including 3,419 with ISO9001, 1,392 with Other, and 902 with ISO14001 certification.