The Wall Mount Rotary Volume Knob (3 Color Wall Plate) from Pyle Pro is a single-knob control that installs in a junction box in your wall, like a light switch. It allows you to control up to two speakers in one room with the 12-position rotary fader. The volume knob can be used with any A/V system and makes an ideal companion for the HiFi Four-Pair speaker selector. Additionally, the kit includes a total of six wall plates in different styles and colors for extreme versatility in matching your decor.