The HC-0810M Finnex controller offers a precision digital control with LED digital display which maintains water temperatures at a constant level protecting your livestock from temperature fluctuations. Easily adjustable high/low temperature settings with an audio alert separates this aquarium heater controller from the rest of the competition. Also setting these controllers from Finnex competitors, have ease of mind as this controller features a dual relay inter-work, doubling the protection, disabling heating in case of over heating. This advanced controller carries three prong power receptacles that work well with all Finnex Titanium Tubes as well as other brand's heating elements as well. For the utmost advanced aquarium, the digital Finnex heater controller fits right in.