High-quality materials: The submersible heating rod is made of high-quality quartz and glass, waterproof, explosion-proof, safe, energy-saving, with indicator lights, easy to install, even and stable heating, and long service life . Adjustable temperature: The top of the submersible heating rod has an adjustable knob, and the middle part has a temperature range indicator mark, and the adjustable temperature range is 2034 . A sensitive overheat protection device is installed in the stick. Submersible: The submersible heater is waterproof and can be completely submerged in the aquarium. It can work in an environment with a maximum immersion depth of 120 cm. With suction cups: The submersible heating rod is equipped with 2 fixed suction cups. Wet the suction cups during use and place them on the wall of the aquarium to absorb. The suction cup can be strong and it is not easy to fall off. Scope of application: The diving heating rod can be used in fish tanks and aquariums, suitable for carp, arowana, turtles and other animals. (Note: This product is only suitable for freshwater and saltwater use)