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Get the #Retevis #RT57 to build the most trusted intercom system for home and office.   

Get the #Retevis #RT57 to build the most trusted intercom system for home and office.
Get the #Retevis #RT57 to build the most trusted intercom system for home and office.

The important is that it has the Duplex mode!!! You can speak to another user if they are speaking at the same time.

Published Date：1/7/2019 9:21:48 AM    From：Facebook   

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