4 Input 1 output 3.5mm audio splitter: input 4 audio sources and select one audio source to output, avoid frequent plugging and unplugging
1 Input 4 output 3.5mm audio switcher: Select 1 audio source input and switch the output mode between speakers and headphones. (Note: 4 can not be output at the same time)
Plug and play does not require an external power source, allowing you to listen to music easily.
The AB audio switch can be used in both directions, with a volume adjustment knob. (Note that you need to increase the volume of the audio source)