3.5"TFT LCD color video monitor, plastic case, with clear image and voice, beautiful design We ... and multi-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, Support ...