CDV-35A: In house Unit
COMMAX Color Video Phone with 3.5" LCD Display.
Control by using optical-touch keys.
Allow you to connect up to two door stations and home phone (DP-4VHP, not included in the kit).
Features:
* Blue light Touch Button(Capacitive Type)
* LED Back Light
* PAL, NTSC 
* Talk with a visitor
* Monitoring an entrance
* Up to 2 cameras, 2 monitors and 2 interphones