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