Periha aquarium, Inc is a joint venture with 20 years of professional R & D experience, specializing in the production of heating rods, fish tank lights, water pumps, filters outside the tank, and other aquarium supplies. SPECIFICATIONS: Model: Aquarium Heater Voltage: 110-120V Frequency: 50-60Hz Power: 300W Adjustable temperature: 68℉-93.2 ℉ (20°C-34°C) Capacity: 80 gallons Power cord length: 47.2 inch Features: 1. Knob adjustment operation, easy to install and adjust the temperature 2. Explosion-proof, crack-proof, corrosion-proof 3. Fully submersible, keep your fish in a warm environment. 4. With a heater guard and 2 strong suction cups, not easy to fall off, stable and beautiful 5. The protective cover is used to protect the heating component from accidental collision or damage caused by other reasons. 6. The heater is made with full power, with durable stretch, and the temperature in the aquarium will rise to the ideal state soon, improving the service life Precautions: 1. Before plug-in power, make sure the heater is completely submerged in the water. 2. Usually change the water; cleaning makes sure the heater is unplugged and natural cooling for more than 30 minutes. 3. The heating rod is strictly prohibited from being heated outside the water, as this will endanger the safety of life and property. 4. This product is only suitable for daily indoor aquarium, large, medium and small fish tank heating and constant temperature. Package included: 1x Submersible Aquarium Heater 1x Heater protector(with sucker)