Video door phone

Features:
1. Sharp image effect.
This unit intension includes a 4 inch plate-type CRT monitoring device as well as
a noctovisor, the surveillance image effect stable clear.
2. The visitor calls to the room in.
As soon as the visitor only needs press on the entrance main engine the ringing key
button.
3. The extension station display image and to says.
4. The monitor, monitors outdoor situation.
5. Infrared night vision.
The entrance main engine has the infrared night vision function.Most low light intensity
0.1 LUX works as the outdoors brightness to be low, 300mm was away from
still may use normally.
6. Electrically controlled unblanking.
7. User visible extension telephone ting choice.