This black intercom monitor is designed to give you added peace of mind and the security of knowing who's at the door before you open it and the 2 way audio let's you talk to and screen visitors without having to open the door. It has a very high quality of finish and is sure to make a sleek and stylish addition your home or business decor. You can install up to 2 monitors with the standard screens and up to 4 with the addition of the CPU4 intercom networking device. The screens can also be used as an audio intercom between stations so you easily contact somebody in another part of the house. This unit also includes a record feature which is activated when the door bell button is pushed and stores a photo on an SD memory card so that you can see who called even if were not there when they did.