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About product and suppliers:
        Alibaba.com offers 7,404 audio door phone products. About 36% of these are video door phone, 15% are audio door phone, and 1% are access control system. 

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

There are 7,392 audio door phone suppliers, mainly located in Asia. The top supplying countries are China (Mainland), Taiwan, and Germany, which supply 94%, 4%, and 1% of audio door phone respectively. 

Audio door phone products are most popular in Western Europe, North America, and Northern Europe. 

You can ensure product safety by selecting from certified suppliers, including 3,125 with ISO9001, 784 with Other, and 108 with ISO14001 certification.