Eco Tech Advanced Reptile Thermostat with Day/Night Function and Electronic Dimming. Controls the temperature and lighting in reptile, amphibian and invertebrate enclosures. Features an alarm function to alert you if the temperature falls or increases beyond the set temperature range (between 1-5 degrees). Features night time temperature reduction that simulates wild conditions and dimming control that prolongs the life of the heat source.  Controls heating devices up to 1200watts.