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About product and suppliers:
        Alibaba.com offers 27,361 nvr products. About 44% of these are cctv camera, 23% are cctv dvr, and 23% are cctv system. 

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

There are 27,277 nvr suppliers, mainly located in Asia. The top supplying countries are China (Mainland), Taiwan, and Hong Kong, which supply 98%, 1%, and 1% of nvr respectively. 

Nvr products are most popular in North America, Western Europe, and South America. 

You can ensure product safety by selecting from certified suppliers, including 3,560 with ISO9001, 2,791 with Other, and 622 with ISO14001 certification.