Zoo Med Turtletherm Automatic Preset Aquatic Turtle Heater 50 WattsAutomatic preset aquatic turtle heater features 50 watts for heating up to 15 gallons of water. Preset: Simply attach to the inside wall of your turtles enclosure and plug in. The TURTLETHERM will warm the water to 78'F (26'C). SAFETY: The TURTLETHERM will automatically shut off if removed from water. APPLICATIONS: For use in aquatic turtle habitats with up to 15 gallons of water*. (*For use in 15 gallons of water. Heater must be fully submerged.)