This is a suite of affordable, entry-level remote volume control and input signal selection kits

  This kit uses the CPU control input signal selection and control motor rotation potentiometer to complete the control volume.
  Use the original ALPS metal shell sealed potentiometer, high reliability, and excellent sound quality.
  The board uses original ALPS potentiometer that supports two balanced inputs and 4 dual-channel inputs.
  With a dedicated remote control, remote control or manual operation, the function is complete.
  Working voltage: 9-12VAC power supply.
  Potentiometer and press plate separate design, installation more flexible.
  Size: Motherboard: 410mm × 55mm,  potentiometer board: 55mm × 45mm

package include:

Motherboard × 1, potentiometer board × 1

Infrared receiver × 1 

Signal selection pulse switch × 1

Remote control × 1 (no battery)