Aquarium Heater Fish Tank Submersible Heater Turtle Heat Rod With Temperature Display External Temperature Controller Specification: 100WSize: 26.5cm longColor: blackMaterial: glassPackage content: 1 fish tank heating rod1. It is applicable to freshwater and marine aquariums, bettas, frogs, newfish, turtles, aquaculture, glass containers and hydroponic systems2. Intelligent temperature control automatic constant temperature function. When the water temperature reaches the specified temperature value, the heater will automatically turn off (LED off). When the temperature is lower than the target temperature, the heater will automatically start heating (LED on).3. Warm reminder: the heater is fully submerged, made of shatterproof quartz glass, and has automatic safety shutdown function to avoid overheating.4. It is easy to install to ensure that the thermometer is completely submerged in the water for several minutes. The temperature controller can be adjusted between 59 and 95F. Just press the set button to set the temperature, and then it can start working. Please put the heating rod at the water outlet and completely immerse it in the water.5. Easy to use You can easily adjust the temperature knob to set the temperature you want. 2mm thick quartz glass can be used in freshwater and brine aquariums