Description Bilge Water Alarm Panel w/Pump Switch (SeaDog)– Injection Molded ABS– Provides an audible and visual means of warning that water level in your bilge is beyond your bilge pump float switch level.– No need for separate bilge pump switch as the control switch selects between automatic and manual function of the bilge pump.– Rated: 15 Amps.– NOT FOR USE WITH PUMPS THAT HAVE BUILT-IN SWITCHES.– A: 2-7/16″– B: 4-1/2″– C: 1-3/4″– D: 4″