Smart Macerator Control - 12VDCMonitors motor and pump to prevent dry run and overload.Features: If pump doesn't prime in 7 seconds or runs dry for 5 seconds, control will shut down pump SMC control can be reset by turning off and on switch - power need not be turned off If power is not turned off to the control, control will job macerator pump for a few milliseconds every seven days to prevent binding of impeller If pump draws more than 20 amps, control will shut down pump