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About product and suppliers:
        Alibaba.com offers 60,555 tcp/ip products. About 11% of these are time recording, 9% are access control system. 

A wide variety of tcp/ip options are available to you, such as biometric time recording, punch card clock, and electronic time clock. You can also choose from fingerprint, face. As well as from free samples, paid samples. 

There are 60,416 tcp/ip suppliers, mainly located in Asia. The top supplying countries are China (Mainland), Taiwan, and Hong Kong, which supply 98%, 1%, and 1% of tcp/ip respectively. 

Tcp/ip products are most popular in Domestic Market, North America, and Southeast Asia. 

You can ensure product safety by selecting from certified suppliers, including 20,885 with ISO9001, 6,818 with Other, and 2,199 with ISO14001 certification.