This is a Quad Channel Switcher
.4 inputs to 1 output or 1 input to 4 outputs for both audio or voltage (AC/DC)
.Clock input with clock division knob
.Skip step & reset sequence push buttons and trigger controls
.Direction with cv control to play sequence backwards, pendulum or forward.
.Each step features skip, play or hold functions
.Digital inverted output which offers "Fuzz" like sounds when using audio.
.4 monitor leds to show the actual state.
Among many other possibilities it allows to:
.Turn any 4x4 step sequencer into a 16 step sequencer.
.Scramble sequences with diferent clock division settings.
.Route 1 audio or voltage signal to 4 diferent destinations.
.Switch between 4 audio or voltage signals.
More about it here: