1) 7" high resolution color TFT LCD panel display, with high resolution and high contrast ratio
2) one camera to two monitors, the intercom can be shared between the monitors and the camera
3) The camera could be turned up/down/left/right to get clearer image
4) Uses CCD or CMOS image sensor
5) Hand free intercom, clear voice
6) Alarming function
7) Unlock the electronic controlled door lock
8) Monitor the situation out of the door