Fully Upgrade, Totally No Noise and No Sound Interference: 4 independent switches to select different inputs or outputs, fully isolated independent circuit, make sure that each signal is not affected by the other three channels.
Very Useful Functions: Can be used as 4-IN-1-OUT or 1-IN-4-OUT. Conveniently to switch among different audio sources or choose among different outputs. You can use it to debug or compare your various audio devices.
Very Easy and Simple Use: Fully passive, no power and no driver required. Add 4 blank squares for you to mark different audio equipment. Please note there are two IN/OUT ports. The one that is opposite with others has priority. The other one is added since some customers want to connect all cables at one side.
Super Mini Size: Even smaller than half of your palm. It will take very few space of your desktop. You can also carry it around very conveniently.