In earlier days intercoms were used for simple audio communication in buildings, offices and multi family houses. With today's home security systems, intercoms allow you to speak to your visitor, view the lobby to make sure no one uninvited is gaining access to the building, and then buzz the door open. Home security systems have changed so much in the last several years, and with today's technology, the sky is the limit when it comes to system integration. Let us take your project and bring your vision to life. When you need a home or office security system, alarm or intercom, trust the KEYMAN advanced security.