GSM Intercom And Access Control And Alarm System

Answer Your Doorbell With Your Mobile Phone While You Are Not At home.

A Cutting Edge Intercom with A Twist. Answer Your Doorbell with your mobile phone regardless of whether you are home or not, talk to the visitors and open the gate with your mobile phone.

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http://www.witura.com/products/remote-monitoring-and-control-and-data-collection-system/gsm-intercom.html