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About product and suppliers:
        Alibaba.com offers 461 4ch sdi products. About 10% of these are radio & tv broadcasting equipment, 1% are other home audio & video equipment. 

A wide variety of 4ch sdi options are available to you, such as free samples, paid samples. 

There are 461 4ch sdi suppliers, mainly located in Asia. The top supplying country is China (Mainland), which supply 100% of 4ch sdi respectively. 

ch sdi products are most popular in Domestic Market, Eastern Europe, and Southeast Asia. 

You can ensure product safety by selecting from certified suppliers, including 98 with Other, 81 with ISO9001, and 2 with ISO10012 certification.