The MSC-A has a transformer isolated RCA jack and a 3.5mm jack for an unbalanced mono line input to balanced mono (600 ohm) line output in a single-gang decora style Lexan panel. The MSC-A provides an easy way to input mono audio signals from a variety of audio devices into an existing sound system. The module mounts into a standard single-gang electrical box (not provided) and can be finished off using a matching decora cover plate (see HPS-1). Connections on the sound system side of the interface consist of a 3-pin terminal. Modules are available in Brown, Ivory or White.