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About product and suppliers:
        Alibaba.com offers 4,324 dvr nvr products. About 34% of these are cctv dvr, 33% are cctv camera, and 14% are cctv system. 

A wide variety of dvr nvr options are available to you, such as network, infrared. You can also choose from internal, ip camera, and analog camera. As well as from sata, sataii, and ide. And whether dvr nvr is 3.5", or 2.5". 

There are 4,324 dvr nvr suppliers, mainly located in Asia. The top supplying country is China (Mainland), which supply 100% of dvr nvr respectively. 

Dvr nvr products are most popular in North America, Western Europe, and Mid East. 

You can ensure product safety by selecting from certified suppliers, including 852 with ISO9001, 316 with Other, and 12 with ISO14001 certification.