Bilge Monitor, switches bilge pump ON and OFF.
Red light on panel indicates pump is running
Activates loud buzzer (included) if pump runs longer than two minutes
Pumps an additional 15 seconds after bilge is empty to completely clear bilge.         NO mercury 
5ft of Marine Grade Tinned Wire                                                                       Epoxy sealed and all plastic body and components                                          Bracket for easy attachment
Works with pumps up to 30 AMPS
This bilge alarm alerts to excessive pumping which indicates potential bilge flooding problems.
A micro processor and printed circuit is used in this an many of Aqualarm's marine electronic products for reliability and timing accuracy.
Smart Bilge Pump Switch Data Sheet