Sealed heater, fully submersible, and fully automatic. When using the semi-submersible type, the tube will not burn if the water level does not exceed the warning level. The heater can be placed at any angle, and the temperature control unit at the top is easy to use. The temperature can be easily and accurately adjusted, which can be seen on the indicator. The sensitive and reliable adjustment system ensures the stable temperature you desire. It can be used in freshwater or seawater thanks to its compact design that fits most aquariums. The package includes supports and cones to determine the ideal location in the tanks. Specifications Voltage (V): 220 volts - 240 volts Frequency (Hz): 50/60 Hz