This is a 4K CVI/TVI/AHD/CVBS to HDMI converter, designed for HDMI Video transmission and HD loop out, Support 4K CVI/TVI/AHD Video input, 4K Image loop output, 1080P HDMI Output, Auto match HD input, indicator display input resolution, it is a great advantage video transmission device, widely use at anywhere monitoring system, such as Shopping Mall, Community Monitoring, elevator Monitoring, traffic monitoring and so on.....