The PVCS5 is an in-wall A/B source selector switch that installs in a junction box, just like a light switch. This switch makes it simple and easy to switch between two different audio sources and direct that audio to two sets of speakers, such as one set indoors and one set outdoors. Activate the A speakers, B speakers, or both! The PVCS5 can be used in conjunction with standard or impedance matching volume controls as well. The included standard and Decora-style wall plates means this switch will unobtrusively blend into your wall. Up to 150 W power load handling.