110V with 3 prong grounded plug. 1500W stainless steel element. Magnesium anode rod. Rectangluar shape with 2'' of foam insulation. Glass-lined tank for longer life. 6 year warranty on tank, 1 year warranty on parts for both commercial and residential use. Temperature/pressure relief valve included. Mounts on wall or floor. Meets ASHRAE 90.1 standard. See Info Page for technical and installation specifications.