Switch audio source input, and adjust volume level Up and Down easily. 3 IN 1 OUT 3.5mm 1/8" aux input output jacks. Select signal and control volume in one box. No amplification function Build in aluminium CNC chassis, looks nice and durable. No need power supply. Plug and play. Description:

This MC31 box is a mini size input signal switch box, with volume controller, you can select signal and adjust volume quickly without plug/replug cables and using the music player any more.

Product design is passive selector and pure volume level control, it is not affects sound quality or color added. (note it has no amplification function)

Very conveniently to control volume to get a comfortable listening level.




Connectors:
3 x 3.5mm (1/8") input
1 x 3.5mm (1/8") output
(It can use in both directions, it is reversible, use as 3 IN 1 OUT, or 1 IN 3 OUT, 3 outs are not at the same time)


Use instruction:
No need power supply. Plug and play.
Switch the left knob: for select source ways.
Turn the right knob: for Increase or Decrease volume.