Video door phone systems in Dubai are generally used in many places, such as people’s house, especially for the people live in high-rise housing, and the inside and outside apartment building for guarding outside people and monitor the situation of residential district to ensure the safety of residents. Because most of Visual doorbell intercom used in residential areas have electronic alarm systems, which can tell the security guard there is an emergency situations happened. Video door phone intercom systems also have other functions, with their reliable performance and easily install and using, Doorbell bar code system are welcomed by more and more people.