Item Type: Fish Tank Heater_x000D_ Material: ABS+PTC_x000D_ European Standard: 220V 1High Quality Material: ABS protective cover, fast heat dissipation, safer. Completely reliable, with three layer sealing and waterproof design, more assured when using. 2Novel Appearance: The streamlined design is adopted, and the upper and lower shells are joined together, which reflects the perfect joint between man and nature. 3PTC Ceramic Heating Chip: Uniform heating, fast heat conduction, low heat loss, long service life, higher heating effect than traditional heating wire, and more energy saving. 4Powerful Suction Cup: It can be fixed without falling, and the position of the heating rod can be fixed according to the depth of the fish tank. Rotary temperature control, automatic constant temperature. 5Adjustable: The temperature of the heating rod can be fine?tuned according to the temperature scale on the top of the heating rod, and the heating rod will automatically stop heating after heating to the set temperature.1. For large fish tanks or aquariums with a length of more than 2 meters, two heating rods can be used together._x000D_ 2. The water temperature of the fish tank is affected by the surrounding environment. In winter, the water temperature is low. It is recommended to buy a higher power wattage._x000D_ 3. This heating rod does not have the function of disconnecting the power from the water, and the power must be disconnected 10 minutes before the water is separated._x000D_ 4. The heating rod must be completely immersed in water, not exposed to the surface of the water, and not buried in sand._x000D_ 5. Please allow 1cm/0.4in error for manual measurement.1 xHeater