The videophone box installed by CD Engineering in Brussels is ideal for the house or flat. Indeed, the system to unlock the door is protected. Only the intercom inside your home can open the door. You can therefore easily control who can or cannot enter your condominium or house. In addition, having a videophone is more important than just a standard doorbell. Some models also have an alarm system in case of intrusion. It is also very practical when you live in a building. It saves you having to go downstairs to open the door rather than just pressing a button.