Welcome to our store! 1. Intelligent Temperature Control: The heater automatically heats up to the set temperature; when the water temperature reaches the specified temperature value, it automatically stops heating. 2. Fast Heating: Submersible aquarium heater heats up quickly, 20W power, high efficiency, gradual heating, 26℃ constant temperature, water temperature can be increased by 6℃-8℃. 3. Safe and Reliable: The aquarium heater has IPX8 waterproof design, explosion-proof and leak-proof, ensuring your fish are safe, suitable for aquariums and fish tanks. 4. Scope of Application: The aquarium heater is suitable for 5L-10L water volume, suitable for fresh water and salt water, the water level can be as low as 1cm. 5. Note: When heating, the heater must be completely submerged in water. For your safety, please unplug the power supply when cleaning the water tank or aquarium. Product Type: Aquarium Heater Material: Glass Size: Approx. 12.5cm/4.9in Plug: EU Plug 220-240V Waterproof Rating: IPX8 Power: 20W Constant Temperature: 26℃ Application: 5-10L Aquarium 1 x Aquarium Heater If you find any product problems after receiving the goods, such as damage or incorrect quantity of goods, please contact the seller immediately. We will do our best to provide you with satisfactory customer service.