If you prefer an easy-to-use keypad for convenient cycle timing adjustments and a handy LCD cycle status readout, choose model MDV-400L. You'll never wonder when it's set to actuate again with its continuous, clear countdown display of remaining cycle or drain open times. Added features include an external test and valve fault functions, both with LCD readout. Adjustable intervals between valve actuations are 1 minute to 99 hours 59 minutes. Adjustable draining periods are 1 second to 99 minutes 59 seconds.