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 anymore.
Product design is a passive selector and volume level control, it is not affects the sound quality or color added. (note it has no amplification function)
Very conveniently to control volume to get a comfortable listening level.
Features:
> 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 box.
> Build-in solid aluminium CNC chassis, looks nice and durable.
> No need power supply. Plug and play.
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, 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.
Item Dimensions: L76 * W60 * H26 mm
Net weight: 105g