Waterproof, explosion-proof and anti-corrosion make it stronger than normal glass and metal heater. Your Fish will be no longer afraid of winteSpecificationProduct name: Aquarium HeaterProduct power: 50W, 100W, 200W, 300W, 500WPower cord length: 150cmTemperature control range: 20°C-34°Cfeature:1. High- quality resistance wire, uniform heating, long service life and long service life.2. Double- layer waterproof and heat preservation, water temperature can be controlled, easy to adjust and read temperature.3. The power indicator light is on to indicate that the heater starts to work. When the water temperature reaches the specified temperature, the power indicator light automatically goes out.4. High- strength heating wire, double waterproof protection, long heating life.5. Equipped with 2 powerful suction cups to strengthen the heating rod to prevent it from falling.How to choose heating rod wattage( Fish tank length x fish tank width x water level net height) /1000x2= required heating rod wattagePackage content: 1x aquarium water heaterPrecautions:1. When using this heating rod, the water must be immersed in the heating rod and not exposed to the surface of the water, otherwise the power supply will be burned out2. When cleaning the sink, changing the water or performing maintenance, cut off the power 10 minutes in advanceThank you for your choice, if you have any questions during use, please contact us, we will reply you within 24 hours, I wish you a happy life!