A fully 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 top thermostat is easy to operate. The temperature can be adjusted comfortably and accurately, and it is clear on the indicator. The sensitive and reliable adjustment ensures the stable temperature you desire. It can be used in fresh or saltwater with a compact structure that fits most aquariums. Includes mounts and suction cups for the ideal placement you want in tanks. Specifications Voltage (V): 220V - 240V Frequency (Hz): 50/60Hz