About This Aquarium Heater for 7-20 gallon：Our aquarium heater utilizes an explosion-proof quartz heating tube,which is safer and more reliable compared to traditional coil heaters.Suitable for 7-20 gallon fish tanks. It operates at a rated voltage of 110-120V. Please consult the size chart to select the appropriate heater wattage. LED Temperature Display:The water temperature is continuously displayed on the external controller,There is no need for additional aquarium thermometers.temperature sensors ensure accurate temperature measurement, and you can switch between Celsius and Fahrenheit temperature units..[Accuracy：±3°F] Easy to install:Due to its compact design and strong suction cups,this heater can be easily installed at any location within your aquarium.It is suitable for both freshwater and saltwater environments. Safety features:For safety,the heater includes overheat protection,which automatically stops heating in case of overheating or low water levels. If the temperature becomes too high, "HH" will be displayed on the remote control,Also equipped with dry-burn protection, meaning it won't immediately stop working after leaving the water surface. It will automatically cease operation after a while of being away from the water surface After-sale service:The heating rod must be completely immersed in water.Suitable for 7-20 gallon aquariums
