This heavy-duty water heater heats water only. Use for cold weather and travel. Great for wintertime jobs. Immerse in water at the proper level. Plug into any grounded wall outlet. It will heat water continuously over 180 degrees and towards boiling. The silver-colored stainless steel tube contains a thermal overload safety switch, it can automatically cycle on and off as needed to maintain water temperature. It will not overheat and save power.