Video Door Phones

With LCD, with colour. Main Functions: (1)One or two entry door stations support four indoor phones at most. (2)Two-wire connecting between door station and indoor phones , intercom in indoor phones. (3)30 seconds sixteen chord melody ring, 30 seconds active supervising, 120 seconds private conversation. (4)Illuminating LED in door station provides clear picture even in nighttime. (5)Remote unlocking.