GMF 353 multimedia socket with cover with ABS, has a return channel from a CATV network signal. Casted corpus provide perfect screening. F connectors. It could be mounted on a surface with screws or glue, and if equiped with streaching anchors also in a under-plaster box. Attenuation in a sending direction RTV -4,5 dB, DATA - 5,5 dB, in a return direction: DATA - 1 dB.