7 inch digital video door phone wireless intercom for home security system 1. IntroductionOur wireless video door phone is composed of ... . It’s applicable in apartment, hotel, house, office, building and so on. The outdoor camera is ... outdoor camera is available(4) 3.5 or 7 inch TFT color panel(5) Surveillance, wireless unlock, ... up to 4 outdoor cameras 7 inch digital video door phone wireless intercom