S-Series Electronic Sensing Bilge PumpCompletely automatic with manual override Submersible and ignition protected High efficiency, low amp motor Stainless steel shaft Includes backflow preventer Will turn on every 2 1 2 minutes for about one second to sense for water and will continue to run until water is removed Water is kept in check between 1 8" and 3 8" depths Max. Flow Rate: 500 GPH Voltage: 12 V