Product DescriptionSpecification: 100WSize: 100W, length 26.5cmColor: BlackMaterial: GlassPackaging content: 1 fish tank heating rod1. Applicable to freshwater and marine aquariums, fighting fish, frogs, salamanders, turtles, aquaculture, glass containers, and hydroponic systems2. Intelligent temperature control with automatic constant temperature function. When the water temperature reaches the specified temperature value, the heater will automatically turn off (LED off), and when it falls below the target temperature, the heater will automatically start heating (LED on).3. Kind reminder: This heater is fully submersible, made of shatterproof quartz glass, and has an automatic safety shutdown function to avoid overheating.4. Easy installation ensures that the thermometer is completely submerged in water for a few minutes. The temperature controller can be adjusted from 59 degrees Fahrenheit to 95 degrees Fahrenheit. Simply press the set button to set the temperature and it will start working. Please place the heating rod at the water outlet and completely immerse it in 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 saltwater aquariums