The Donner ABY BOX pedal can be used to solve many problems in the complexity of audio switching. In particular, it allows you to switch between one input signal, or another, or to use both at the same time. The circuit can also work in the other direction. That is to say that the signal circuit can start from one input and exit through two outputs, or enter through two inputs, and exit through a single type. You can then either choose between A or B, or use both handsets. The LEDs will show you the status of the active signal.

Model: EC1162