3.5"TFT LCD color video monitor, plastic case, with clear image and voice, ... appartment; 3, PBX system for multi-appartment; 4, Wireless system;7435 CX/NCX descriptionFuction:1, Audio/video communication, ... 3.5'' TFT LCD color display;2, Intercom, inspection and Remote unlock;3, ... -call with extended phone set;5, Support two camera for 7435 NCX;6, Optional for memory inside. ...