![Audio Switcher](https://images-na.ssl-images-amazon.com/images/G/01/x-locale/common/grey-pixel.gif)
4-port bi-directional switching
4 inputs 1 output: Connect four audio sources to (IN / OUT) A / B / C / D and use the switch knob to select the audio input and obtain the output.1 Input 4 Outputs: Connect the audio source in / out and select the audio output between (IN / OUT) A / B / C / D(Note: Only support one output/input selection, can not support 4 output/input at the same time) Compatible with all devices with 3.5mm audio output ports, such as mobile phones, laptops, computers, MP3, MP4, earphones, active speakers, etc.