The Oase HeatUp 50 Watt Aquarium Heater features uniform temperature level thanks to the patented bi-metal technology. 50 Watts. Recommended for tanks up to 15 gallons. Glass construction. Fully submersible. Suction cups and bracket for securing to the aquarium. Adjustable temperature control. The heating function is displayed via the activated control light. For use in fresh and saltwater aquariums. 8" long. 3 year manufacturer warranty. UL listed. Made in Italy.