7 years factory high efficient steam generating machine 1.26 years experienced technician 2.over-heat protection ... 3.automatic 7 years factory high efficient steam generating machine Power: 4KW,6KW,7.5KW,9KW,10.5KW,12KW, ... control, stainless steel tank, long-life elements, automatic water feed, dual low-water protection, over heat protection,automatic drainage function,pressure ...