The latest LCU-1S comes with an LCD panel allows the user to read and make a setting with ease. LCU-1S is preprogrammed for use with Z-1200II, S-100X, S-200X and SW-250, flow rate are adjusted to supply one unit at the time. An optional "Null" mode offers versatility for use with any model, running the pump at 100% output; enable it to supply up to maximum 4 units at a time.