The speaker switch modules, used for switching on or off speakers in a room, are either SPDT (MSC-L), DPDT (MSC-L1), or DPDT center-off (MSC-L2). The SPDT version is the standard. The module mounts into a standard electrical box (not provided), and is finished off with a matching decora coverplate (see HPS1). Connections on the backside of the switch are made via pigtail wires. The MSC-L modules are available in brown, ivory or white.