MOS Insert, 2-Port RCA Module, 1 unit high, White. Red and White barrel colors with rear screw terminals. The innovative Multimedia Outlet System (MOS) consists of a surface-mount box and single- and dual-gang wallplates which accept a variety of copper, fiber, and A/V connectors. The system is ideal for multimedia applications in conference rooms, training rooms, classrooms, auditoriums, and other areas.