The ZeeVee HD-B28404 is a tested HDMI to QAM RF digital modulator. It is designed to convert digital signals from HDMI sources to RF signals for compatibility with older television sets or for amplification purposes. This product allows users to connect modern HDMI devices to older TVs that require RF inputs or to create a stronger RF signal for extended cable runs. The ZeeVee modulator ensures reliable signal conversion and is a convenient solution for those looking to enhance their TV viewing experience. Tested power on, web UI accessible, HDMI 1080p video detected. RF output unverified. This unit is sold as is.