Totally sealed, completely submersible, and fully automatic heater. when half submersible type is applied the tube wont bum if water does not exceed the warning level, the heater could be put at any angle, the top temperature controller is easy to operate.Temperature can be adjusted conveniently and exactly, which is visible on the indicatorThe sensitive and reliable adjustment ensures the stable temperature you want It can be used in fresh or seawater with a compact structure range for most aquariumsBrace and suckers are included for the ideal position you want in the aquariums.SpecificationsVolt(V): 220V-240VFreq(Hz): 50/60Hz