This is a custom 5 channel Bandwidth CV/Expression splitter, each out is a 0-5v CV output signal, it has 2 inputs 1/4 sources (CV in and CV aux) that are routed into each out via the little toggles (you can distribute as you want), the knobs allows control over the amount of sweep that will be going into the output (and the led will show the movement for a visual help), so you can sync multiple parameters movement from just one source. There is an extra toggle that bypasses the CV aux and enable the knob on the side for the tabletop enthusiast that also like to sweep manually in certain spots. For example if you have a sine wave going from 0 to 5v, you can fine tune one out to go from 2v to 3v sweep, while other is is just moving from 1v to 2v and all synced to the original sweep (so no longer you need to be ultra precise to manipulate those sweet spots).