... fantastic prices steady performance,easy install ip video door phone,video intercom,video door bell,video intercom ip, 1) Ultra-thin body, ... 800X480 resolution, and 24-bit true color display. 4) Video intercom: D1/Half D1 definition, with special audio processing circuit ... service: the management center can issued picture, characters and video information to the indoor phone.10) Visitor message, call ...