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About product and suppliers:
        Alibaba.com offers 1,023 room to room intercom products. About 6% of these are corded telephones, 3% are elevator parts, and 2% are audio door phone. 

A wide variety of room to room intercom options are available to you, such as yes, no. You can also choose from doorbells, elevator parts, and entry doors. As well as from plug, battery. And whether room to room intercom is personal, residential elevators, or auto. 

There are 1,023 room to room intercom suppliers, mainly located in Asia. The top supplying country is China (Mainland), which supply 100% of room to room intercom respectively. 

Room to room intercom products are most popular in Domestic Market, Southeast Asia, and North America. 

You can ensure product safety by selecting from certified suppliers, including 514 with ISO9001, 67 with ISO14001, and 57 with OHSAS18001 certification.