Product DescriptionSpecifications: 50W, 100W, 300WSize: 50W length 20.5cm, 100W length 26.5cm, 300W length 30.5cmColor: BlackMaterial: glassPackage content: 1pc Aquarium heating rod1. ApplicationSuitable for freshwater and saltwater aquariums, Betta, Frogs, Salamanders, Turtles, aquaculture, glass containers and hydroponic systems2. Intelligent temperature controlAutomatic constant temperature function, when the water temperature reaches the set temperature value, the heater automatically turns off (LED Off), when it is lower than the target temperature, the heater automatically starts heating (LED On).3. Warm tipsThis heater is fully submersible, made of shatterproof quartz glass and has an automatic safety shut-off to avoid overheating.4. EASY INSTALLATION Make sure the thermometer is fully submerged under water for minutes, the temperature control is adjustable from 15 to 35C (59 to 95F), just press the set button to set the temperature, it will start working. Place the heating rod in the water outlet and fully immerse it in the water. 5. Easy to use You can easily adjust the temperature knob to set the desired temperature, 2mm thickened quartz glass, can be used in freshwater and saltwater aquariums