Features: Convenient: You can use the two suction cups to fix the heating rod and easy to hide in the fish tank. There is the temperature indicators on the heating rod so that you can know the temperature any time in the Aquarium. Quality: Thickened quartz glass is explosion-proof anti-corrosion double-layer waterproof insulation high grade waterproof standard. Note: When the heater is in use the heating rod must be completely immersed in water to avoid dry burning damage to the heating rod. Usage: Place the heater bar vertically or horizontally in the aquarium to make the indicator light as clear as possible. Then plug in the power cord and the indicator lights up to indicate that it is working. Customer Service: If you confront any problems about our products please feel free to contact us we are ready to help. We will solve your problems as soon as possible. Specifications: Material: Glass Function: Temperature control includes: 1 *Explosion-Proof Aquarium Heater 2 * Sucker "