The Listen Up is a small passive expander for the Listen modules that provides stereo 1/4\” (6.35mm) jack inputs and outputs. It connects to one or two Listen modules and/or WAV Recorder module with the included 3-pin cables. There are four 1/4\” jacks arranged in left/right pairs. The left jack of each pair can be used as a TRS stereo jack if the right jack is unpatched. Four 1/4 (6.35mm) jacks arranged in two stereo pairs. Each stereo pair can be connected to the same module or to separate modules. Each stereo pair (left/right) is bi-directional (input or output). Left In and Left Out jacks are TRS stereo if corresponding Right jack is not unpatched. Uses no power. Connects directly to host module using 3-pin cables. Two 3-pin cables included.