Proper terrarium temperature is recommended for a reptile or amphibian"s healthy, active life, Add a Temperature Controller to maintain a pet"s terrarium at any preset temperature between 60and 105F, Simply place the temperature probe in a terrarium using the included suction cup, then connect any type of incandescent heat source (heating device is not included), An added safety feature automatically shuts off the heating system if terrarium temperature exceeds 110F due to heater malfunction or excessive sunlight, Choose from two types: a 500 Watts system with a single input or a three-outlet device that can manage 1000 Watts of heating power, Zilla 500Watts Controller, SKU: RYLHC4767