25W Small Submersible Heater: Suitable for 1-5 gallon fish tank; Temperature Control Range 59℉-93℉; When the temperature is lower than the set value 1℉, the heater automatically heat up; Automatically stop heating when the set temperature is reached
External Controller and Built-in Thermometer: Fish tank heater with a built-in thermometer, display water temperature of the fish tank in real time; HD LED display, the red light when heating, red light off when the temperature is constant, and display error code when the heater fault; The controller is not waterproof, please do not put it into water
Easy To Use: Set temperature by press the button until reach your desired temperature value; The display will flash the desired temperature value three times, then return displaying the current water temperature, setting is done; You can press the button persistently to display 59-93℉ in a cycle