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Maintains Water Temperature within +/-2º F of the setting value. Memory Chip to restore previous settings. Corrosion-resistant, fast heating titanium tube. Precise electronic control with transparent design. Finnex used new technology to create a precision digital control that maintains water temperatures at a constant level. In case of a power failure, heaters are equipped with memory to bring you tank back to it's original settings without any unfortunate mishaps upon power return.