You want to install your A/V components in a closed cabinet or operate them from another room. The MSU250 is the central brain for an infrared remote system. Two sensor inputs with removable screwless connectors allow you to connect an IR sensor eye from outside the cabinet and from another room. (Niles makes sensors to surface-mount on the frame of a TV, flush-mount on the front of a cabinet or mount on a wall, tabletop or even in the ceiling.)