Plastic Intercom System, Feature : Durable, Easy To Install, High Accuracy

An intercom (intercommunication device) or talkback is a stand-alone voice communications system for use within a  building or small collection of buildings, functioning independently of the public telephone network. Intercoms are generally mounted permanently in buildings. Intercoms can incorporate connections to public address loudspeaker systems, telephone and to other intercom systems. There are simple house intercoms and intercoms developed for collective apartments.