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About product and suppliers:
        Alibaba.com offers 371 competition video door phone products. About 1% of these are audio door phone. 

A wide variety of competition video door phone options are available to you, such as battery, plug. You can also choose from paid samples, free samples. 

There are 291 competition video door phone suppliers, mainly located in Asia. The top supplying country is China (Mainland), which supply 100% of competition video door phone respectively. 

Competition video door phone products are most popular in Mid East, Western Europe, and South America. 

You can ensure product safety by selecting from certified suppliers, including 104 with ISO9001, 8 with Other, and 3 with ISO14001 certification.