● Both internal and external thermolator available for easy operation
● Adjustable temperature from 20-34℃（68-94℉）. Maintain constant and stable temperatures  for your aquatic creatures.
● Antiflaming heater cover can prevent fish from going too close to the heater.
● Double sensing probes on the top of heater provide more precise induction. 
● It can ensure the temperature constant at the set point as it can adjust heating power  automatically if there is any water temperature variation.