VOLUME CONTROL: The controls allow you to adjust the volume of a pair of speakers independently of other speakers in a house audio system. They are ideal for both softer and higher volume locations.KNOB: Wire a 5-step linear rotary-style knob for a wide range of listening volumes. Includes junction box and screws as well as white, ivory and almond trim plates to match any room decor.DESIGN: For dedicated audio zones, the décor plates install easily into a wall and work with almost any system. It accepts up to 14 gauge wiring and fits in a standard gang box with a 2.9” depth.