• 100 WATT • Power monitor light: red for heating and green when aquarium has reached set temperature. • Fully submersible and can be placed horizontally or vertically in the aquarium. • For freshwater and marine aquariums. • Shatterproof and nearly indestructable with durable aluminum core and no glass components. • Automatically turns off if heater is left out of water, resets and works normally when placed back in the water. • Large temperature control knob makes modifying the temperature easy.