12 volt, 2.6 Ampt (Int). The Submersible pump with the bigger performance motor giving a greater water pressure. Just place the Supersub 88 pump inside the water tank. It is completely water sealed and, being totally submerged, there are no priming problems. The Whale Supersub 88 works quietly and efficiently from a 12 volt DC Supply. Suitable for use with water heaters and for a shower. Materials: ABS, Synthetic Rubber and Stainless Steel.