These units are capable of converting input voltages of 18 to 35 VDC down to an output voltage of 10 to 15 VDC can convert an input voltage of 8 to 17 VDC up to an output  voltage of 20 to 30 VDC or can be used to regulate the output voltage

Permits use of 15A or 20A 125V straight blade plug with 30A 125V Twist-Lock locking type receptacle

They have World Wide Approvalsincluding USCG

Ground Loop Isolation Input Circuit

5-inch 2-way Marine Speaker with Classic Grilles

Rule - 1500 & 2000 Submersible Bilge Pumps, Part No. 10 - Description 12-Volt Pump - Amps 4 - GPH 2000 Blue Water These units are capable of02 (1500 GPH) has a double insulated motor, 5 16" stainless steel shaft and triple straining system. 10 is a heavy duty 2000 GPH pump. 1 1 8" OD outlets on all. Height: 6", base diameter: 4 1 4". Ignition protected. 2 lbs.